On 2021-03-03 16:03, Matus UHLAR - fantomas wrote:
On 2021-03-03 10:45, natan wrote:
This is server for incomming e-mail with many vdomain and vusers
On 03.03.21 11:38, Benny Pedersen wrote:
number of domains is irrelevant for backscatter
I check rbl in smtpd_recipient_restrictions
still need postconf -nf perferble to help more, all i can do without
it it will be best expirense and google for my part
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if the MX points to it and if it's
ipv4 or ipv6
...with ipv6 lack of rDNS may be worse but with ipv4 it's still a problem
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UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
One OS to rule them all, One OS to find them,
One OS to bring them all and into darkness bind them
oversensitive group
of Americans.
however, the "allow" and "deny" clearly say something, while for
understanding what does "white" and "black" mean, you must have some
background (or, worse, prejudice).
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; h
ermediate CA
>certificate) does not fit in 'smtp_tls_CAfile' but in
>'smtp_tls_CApath'.
On Thu, Feb 11, 2021 at 3:11 PM Matus UHLAR - fantomas
wrote:
huh?
On 11.02.21 16:01, bitozoid wrote:
'smtp_tls_CAfile' doc just mentions "root CAs" for the content of the file.
yes. smtp_
ctives smtpd_tls_cert_file
smtpd_tls_key_file, smtpd_tls_eccert_file, smtpd_tls_eckey_file
supposed to contain certificates and keys. Certificates can be
concatenated in cert files, which can also include private keys.
http://www.postfix.org/TLS_README.html
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Matus UHLAR - fantomas, uh...@fantomas.s
?
yes, however that has nothing to do with helo.
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Depression is merely anger without
can avoid that by not using
helo/ehlo at all.
there's no setting to reject HELO name that doesn't resolve to IP of a
client, mostly because it violates so far all SMTP RFCs.
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Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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On 10.02.21 15:55, Chris Green wrote:
> I could just edit the value in each system, but then all the main.cf
> files would be different.
On Wed, Feb 10, 2021 at 05:31:47PM +0100, Matus UHLAR - fantomas wrote:
setting "myhostname = $(dnsdomainname)" what Wietse r
me years ago, when I maintained the same configs
for multiple apps on multiple servers. I maintained /etc/hosts and
hostnames per-machine and most of the rest was the same.
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Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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to send all email direct to virtual "x.com" using
relayhost and not locally delivered.
put it out of virtual_alias_domains or wherever it's defined.
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V
?
the default is get from your myhostname, can't you set up that one?
btw are you sure you dont mean myorigin instead of mydomain?
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run server behing NAT, I ask
to NAT 25 from the world to other port where I run postscreen and milters.
Note that I usually run amavis which calls both spamassassin and clamav.
Either as content_filter, or via amavisd-milter.
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Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warni
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They that can give up essential liberty to obtain a little temporary
safety deserve neither
2, !SSLv3 should be enough for now.
>After adjusting values the recommended way not getting
>
>connect to correo.dominio.com.ar[]:25: Connection timed out
El lun., 8 de febrero de 2021 10:20, Matus UHLAR - fantomas <
uh...@fantomas.sk> escribió:
% host -t any co
On 31.01.21 09:56, Daniel Armando Rodriguez wrote:
Indeed, it was running chrooted but resolv.conf has the same content
=== # postconf -nf
smtp_tls_protocols = TLSv1.2, !TLSv1.1, !TLSv1, !SSLv2, !SSLv3
On 08 Feb 2021, at 06:20, Matus UHLAR - fantomas wrote:
this is superflous
On 08.02.21 14:48, maciejm wrote:
What I must set to enable "postscreen" ?
On 08.02.2021 14:50, Matus UHLAR - fantomas wrote:
it's described on:
http://www.postfix.org/POSTSCREEN_README.html
I ask because I must use "-o
receive_override_options=no_address_mappings" in
On 8/2/2021 1:38 μ.μ., Matus UHLAR - fantomas wrote:
that's not how milter works, unless you instructed amavisd-milter to
deliver mail by server via "-D server" option.
The default is "-D client", which means, amavisd instructs postfix what
to do with the mail - reject/qua
1 proxymap
smtp unix - - y - - smtp
-o smtp_helo_timeout=5 -o smtp_connect_timeout=5
...
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Varovanie:
with invalid address<->name mapping
The last two produce the major bulk of spambot connections.
Are there any other means to achieve these?
you can block these at smtpd level.
Postscreen doesn't (and won't) check for reverse hostname.
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Matus UHLAR - fantomas, uh...@fantomas.sk
intext, and encryption is not fully standard, so you
disable sending mail to part of internet.
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Sil
H36X5JzLlrw:
client=hedgehog.birch.relay.mailchannels.net[23.83.209.81]
Feb 8 01:54:56 mailgw1 postfix/cleanup[202468]: 4DYmH36X5JzLlrw:
message-id=<464576df-43d0-ecac-5647-99c91a95c...@example.com>
...
again, FILTER applies after mail is received, so next lines in log should
show how the mail is delivered to amavis on p
to make script that will resolve aliases to get user from mail
address, just because of different reason.
hopefully, some day I'll do it. See my discussion with wietse some time ago:
https://marc.info/?t=15986316001=1=2
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Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk
ressource and i
have it setup more or less the way described there + some minor
adjustments needed for my setup.
I would recommend starting with http://www.postfix.org/POSTSCREEN_README.html
to understand what those options mean.
I think barracudacentral is subscription-only.
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Matus UHLAR
ook up empty envelope sender, unless you changed
smtpd_null_access_lookup_key:
http://www.postfix.org/postconf.5.html#smtpd_null_access_lookup_key
however as I said, rfc 1123 (5.2.9) requires you to support empty sender
address and you may get blacklisted if you refuse to do so.
--
Matus UHLA
reject_non_fqdn_sender into
smtpd_sender_restrictions:
Jan 18 09:17:31 smtp1 postfix/smtpd[13065]: NOQUEUE: reject: RCPT from
xxx.xxx.xxx[a.b.c.d]: 504 5.5.2 : Sender address
rejected: need fully-qualified address; from=
to= proto=ESMTP helo=
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Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk
forwarding’s supposed to work?
mail from null address is not supposed to be returned back. This is done to
avoid mail loops and double bounces. Therefore, no SRS is needed.
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Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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nding mail from other
domains than those allowed.
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They that can give up essential liberty
Dnia 29.01.2021 o godz. 19:29:14 Matus UHLAR - fantomas pisze:
yes, but OTOH I'm not sure if fetchmail or getmail support single mail for
multiple recipients.
On 29.01.21 22:24, Jaroslaw Rafa wrote:
From fetchmail website:
"Fetchmail can be used as a POP/IMAP-to-SMTP gateway for an e
>>
smtpd_tls_exclude_ciphers=MD5,SRP,PSK,aDSS,kECDH,kDH,SEED,IDEA,RC2,RC5,RC4,3DES
>> smtpd_tls_mandatory_exclude_ciphers=aNULL
>
>Mostly harmless, but not necessary.
On Fri, Jan 29, 2021 at 06:53:09PM +0100, Matus UHLAR - fantomas wrote:
yes, but when the policy is e
On 29.01.21 12:39, Matus UHLAR - fantomas wrote:
I'd recommend considering domain mailboxes.
On 29.01.21 19:00, Hadmut Danisch wrote:
Is there any better way to do this than local(8) and X-Original-To: ?
I don't know of any
As far as I know, local(8) cannot cope with mails to multiple
On Fri, Jan 29, 2021 at 02:08:48PM +0100, Matus UHLAR - fantomas wrote:
Excluding aNULL should not be needed on smtp port, but apparently
is useful on ports with mandatory encryption.
On 29.01.21 11:53, Viktor Dukhovni wrote:
It is only ever *needed* on the client side, when *authenticating
ile with intermediate certificate to
our certificate specified by smtpd_tls_cert_file, the authority gets added
to certificate chain.
I'm curious if this is intentional.
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Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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hable from Internet
due to firewall restrictions)
ATRN would be answer to this but I don't know about implementation working
with postfix.
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Varovanie: na t
.
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Despite the cost of living, have you noticed how popular it remains?
rs on port 25 - you can spam them that way.
simply said, by blocking port 25 your provider prevents you from sending
spam and requires you to use mail service of them or other providers.
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On 18.01.21 12:45, Daniel Caillibaud wrote:
>After switching to rspamd (was amavis+spamassassin), virtual_alias_maps seems
to be ignored
>(mail to aliases address are bounced with "user unknown"), and I don't find
why…
Le 18/01/21 à 13:13, Matus UHLAR - fantomas a écr
d (user unknown)
postfix/bounce[24922]: 6DD04222ED4: sender non-delivery notification:
87950222EDA
postfix/qmgr[24883]: 6DD04222ED4: removed
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re-auth?
I've had this problem with cyrus sasl IIRC. restarting saslauthd helped.
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Posli tento ma
d.
I don't see any incoming traffic on port 587 at all.
I wonder, internet bots try port 587 on any hosts within minutes.
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strings for authenticated
mail.
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It's now safe to throw off your computer.
ilter file.
the solution can be restricting what user can do in their rules.
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Your mouse has moved.
til no expansions are made or cycle through all maps
with all lookups?
thanks.
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I just got lost in thought. It was unfamiliar territory.
use of a file) in man 5 postconf.
On 06.12.20 12:10, Wietse Venema wrote:
>That's a DEBIAN-specific feature.
Matus UHLAR - fantomas:
but debian-specific is only the defaut value, postfix support
/file/name for myorigin by default, correct?
On 22.12.20 10:30, Wietse Venema wrote:
THIS CO
*origin = read_param_from_file(var_myorigin);
if (*origin == 0)
msg_fatal("%s file %s is empty", VAR_MYORIGIN, var_myorigin);
myfree(var_myorigin); /* FIX 20070501 */
var_myorigin = origin;
}
#endif
--
Matus UHLAR - fa
simply change mail from: to your locl address, but it will
get the errors for delivery failures then.
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I'm not sure if the right place is check_recipient_access and if things
are different under the current version vs the older 2.11.x
nail.com. 900 IN MX 10
mx.hover.com.cust.hostedemail.com.
this must be rejected explicitly.
--
Matus UHLAR - fantomas, uh
tc/postfix/memcache_recipient_whitelist_cache.cf
you need to increate maximum connections available to mysql server.
parameter max_connections on mysql conig.
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Varovani
oint. the point is, especially with allow/blocklists and spam
filters, using own DNS resolvers is important, since shared DNS servers are
often blocked by public DNS lists and the effectivity of filtering lowers.
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Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to
, but our Cyber team wanted us to
implement a journaling mailbox/server and bcc all inbound and outbound
to/from the internet emails to this
mail...@server.com<mailto:mail...@server.com>.
they need to forward syslog as well, since the original recipient
information is lost this way.
--
Matus
to mailman ie the list it gets re-directed to the
other postfix server, which sends it back and we get a mail loop.
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On 25/11/20 1:53 am, Matus UHLAR - fantomas wrote:
However, this thread is off-topic. We should close it with conclusion:
don't avoid duplicate mail based on Message-Id:
On 25.11.20 15:04, Peter wrote:
A better conclusion would be to not consider messages with a missing
or empty Message-Id
On 24.11.20 13:50, Matus UHLAR - fantomas wrote:
note that it's possible to Bcc: message to mailing list so it does not
contain list address in To:/Cc:
... as this message clearly shows.
I set mailing lists not to avoid duplicate messages (and usually drop direct
mail).
However, this thread
in To:/Cc:
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"The box said 'Requires Windows 95 or better', so I bought a Macintosh".
ame=bi...@domain2.ltd
Nov 23 13:13:53 smtp1 postfix/cleanup[46909]: 4CfmKF1CSDz5MwK: message-id=<>
Nov 23 13:13:53 smtp1 postfix/qmgr[25287]: 4CfmKF1CSDz5MwK:
from=, size=94874, nrcpt=3 (queue active)
.
client's MUA apparently does not generate Message-Id: header.
--
Matus UHLAR -
map with a FILTER: destination:
http://www.postfix.org/access.5.html
However, since signing is based on From: address and directives above use
envelope address (mail from:), you should verify that they match before you
sign.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk
to receive emails? Would just
MX records be enough?
A is needed for sending mail over ipv4, is needed for sending mail over
ipv6.
What's your inet_protocols settings?
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tworks allow E-Mail from 2820n.zbmc.eu[192.168.1.20]
as it does allow it from pibackup.zbmc.eu[192.168.1.108]? Can anyone
suggest what might be wrong?
only if 192.168.1.20 was in your mynetworks list, and it is not.
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Warning: I
should happen
before this and when forwarging altered message outside, you may get such
mail rejected, so you must use DKIM-aware forwarder
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, they will get 4xx information about exceeding the
limit
once again:
On 06.11.20 12:08, Matus UHLAR - fantomas wrote:
So, are your sending mail to them or receiving mail from them?
who is sending mail where? Apparently you receive lots of e-mail from/to
nonexistent users, you should configure
ly works for MAIL FROM, see
http://www.postfix.org/postconf.5.html#smtpd_sender_restrictions
http://www.postfix.org/postconf.5.html#check_sender_access
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Varovanie:
ter that you can use directives like:
reject_sender_login_mismatch
reject_known_sender_login_mismatch
reject_unauthenticated_sender_login_mismatch
in smtpd_sender_restrictions, which should do what you want.
Em sex., 6 de nov. de 2020 às 10:42, Matus UHLAR - fantomas <
uh...@fantomas.sk> esc
on the internet.
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"One World. One Web. One Program." - Microsoft promotional adv
, they will get 4xx information about exceeding the
limit
So, are your sending mail to them or receiving mail from them?
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-spf[15576]: prepend Received-SPF: Pass (mailfrom)
identity=mailfrom; client-ip=198.144.154.163; helo=a.benient.com;
envelope-from=qbc...@benient.com; receiver=
read policyd-spf documentation.
It apparently did not start processing the recipient yet.
--
Matus UHLAR - fantomas, uh...@fantomas
enty_limit for that
destination to required limit.
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The only substitute for good manners is fast reflexes.
ion server has reached limit and does not accept
connections.
increasing concurrency limit on the postfix side does not help here.
Increasing maximum number of servers on port 24 could help in the last case.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I w
is DKIM designed.
that's not fault of mailman.
On 02.11.20 15:24, Phil Stracchino wrote:
Sympa *explicitly supports* DKIM and ARC. Another reason for switching. :)
mailman supports DKIM. it's not mailman who breaks it.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk
IP address<->hostname mapping
what you want here is unknown_address_reject_code
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] for service
127.0.0.1:10025
What did I miss?
smtpd_client_connection_rate_limit
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Posli
- you can replace 1.5.6.0/24 by 1.5.6 in hash maps but cidr is more comfort
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"Where do
Pass all remaining options to spamc. This allows you to connect
to a remote spamd with -d or -p.
Anyone's got an idea how to get this with postfix?
Postfix's "sendmail -bv" sends real mail to recipient.
only expanding virtual aliases should be fine.
--
Matus
) mobile operability?
Or, does anyone have any better general guidelines for hardening Postfix?
to allow clients you should enable ports submission (587) and submissions
(465) in master.cf.
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Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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enforce. Drop makes clients retry.
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I wonder how much deeper the ocean would be without sponges.
to use only the domainpart in users address to deliver mail?
you apparently mean only the localpart, and I think it's not posible.
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]:37300
Jul 13 23:50:33 mx1 postfix/smtpd[3580]: connect from
pupiledition.club[84.54.12.227]
Is that intentional? Fixable? Work-aroundable?
your postscreen_blacklist_action is apparently set to ignore (default).
set it to enforce to reject the client.
--
Matus UHLAR - fantomas, uh...@fantomas.sk
by implementing SRS
(forwarding that keeps SPF working).
Domains that configure DMARC but not DKIM (are there such?) are of course in
trouble when their mail is forwarded this way.
The simplest thing to do is to encapsulate the original message
as attachment to a new message.
yes, this should work
illog" | sed 's/.*\[\([^]]*\)\].*/\1/g' | sort -V | uniq >
"/tmp/Bad_IP.txt"
you will miss any that tries multiple passwords in one session I guess...
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with the same
hostname?
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Remember half the people you know are below average.
unholded so postfix will retry delivery
when configuring a new interface, let's call interface number 5,
it is possible to move the mails assigned to interface number 1 and number
2 to interface number 5?
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish N
other delivers it to mail store.
you can do this in virtual alias table, alias table, in .forward file etc.
Note that with alias table or .forward, failure to deliver to the script can
result in multiple delivery.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning:
were told that our mail relays
must accept only TLSv1.2 when doing TLS, and not any prior versions.
I would say this is acceptable for ports with required encryption and
authentication, not for standard SMTP.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT
through your ISP server?
postfix tries to deliver mail directly by default, so it's apparently your
home address that is blacklisted.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu
it yourself.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Eagles may soar, but weasels don't get sucked into jet engines.
xx.xxx.199 scope global secondary
noprefixroute ens4:8
valid_lft forever preferred_lft forever
I did notice 74.xxx.xxx.192 does not have the keyword "secondary" above --
the network-script that created ens4:1 is the same as all the other seven
secondaries.
--
Matus UHLAR - fantoma
.
This is the worst idea. If any of servers will be hacked or password somehow
revealed, you will have to change it on all servers, maybe repeatedly.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie
.
configure thunderbird to authenticate.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
The early bird may get the worm, but the second
be blocked safely.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Silvester Stallone: Father of the RISC concept.
"postconf header_checks"
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
I drive way too fast to worry about cholesterol.
reformat 8-bit headers but I'm not entirely sure if it
should and if it supports that.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu
l as local.
and there is a line proxy_interfaces = myexternalinternetipadress
this help a bit, but the problem lies elsewhere.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT
the messages from there.
On 10.06.20 12:51, Matus UHLAR - fantomas wrote:
This is what "no_address_mappings" in "receive_override_options" is for:
http://www.postfix.org/postconf.5.html#no_address_mappings
See:
http://www.postfix.org/FILTER_README.html
FYI, the amavis d
the messages from there.
This is what "no_address_mappings" in "receive_override_options" is for:
http://www.postfix.org/postconf.5.html#no_address_mappings
See:
http://www.postfix.org/FILTER_README.html
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas
On 09.06.20 23:41, Nathan Ward wrote:
I am trying to figure out the best way to reject RCPT TO addresses with no
domain part - i.e. "RCPT TO: " or similar. I do not want to rewrite
to $myhostname or $mydomain or similar.
I am on postfix 2.10.
On 10/06/2020, at 00:07, Matus UHLAR
ient" into your smtpd_recipient_restrictions
- if you want to deny everyone from doing that, put it before common
permit_mynetworks
and permit_sasl_authenticated
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address
towards dynamic IPS (and even from them).
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
My mind is like a steel trap - rusty and illegal
on=enforce) does great job.
... and it does not introduce delays.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Remember half the peopl
and are
able to reject spam at SMTP level.
some of those recommendations are fine, but you get much more by using two
above described techniques.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na
tus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
"Where do you want to go to die?" [Microsoft]
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