Hello there, and thanks so much for your help
I've got a web+mail server in the same machine. PHP's mail function is
disabled, but other 3rd party functions such as PHPMailer can use
sendmail to potentially send emails, as if I was invoking it from a shell
echo hello | sendmail m...@email.c
Hi there,
I've noticed that one of our servers is receiving a huge amount of
unauthorized requests.
User connects to our server and tries to send an email to any destination.
Our servers denies the message because user is not authenticated. Then, a
bounce is generated to the source address, which
I am setting up an email server on my home box with postfix and dovecot
My server is modem router and has as such an internal and external network
interface
*From my laptop (LAN)*From Thunderbird I get the message: Could not connect
to server localhost. The connection was refused.
Testing with te
Hi Rafael,
quick thoughts. Do you have
smtpd_recipient_restrictions = reject_unauth_destination
in your main.cf?
The request should be rejected and not be queued.
Greets,
Ludi
Von: owner-postfix-us...@postfix.org Im
Auftrag von Rafael Azevedo
Gesendet: Dienstag, 29. Dezem
Hi,
thanks for your replies.
I took a second look at that spam wave and noticed that the scheme
1. Return-Path:
2. Empty From Field
might not actually be true. The From field often contains something, but no
FQDN.
Postfix rejected the spam correctly when pointed at Az
On 2020-12-29 12:36 GMT, Ignacio García wrote:
> finding an answer to prevent sending unauthenticated email to OUTSIDE
> DESTINATIONS ONLY and pretty much all I found is removing
Try including permit_mynetworks in smtpd_helo_restrictions and in
smtpd_sender_restrictions, but omit permit_mynetworks
On 29/12/2020 13:58, Wolfgang Paul Rauchholz wrote:
> I am setting up an email server on my home box with postfix and dovecot
> My server is modem router and has as such an internal and external
> network interface
>
> *>From my laptop (LAN)
> *From Thunderbird I get the message: Could not connect
> On 29 Dec 2020, at 12:58, Wolfgang Paul Rauchholz
> wrote:
>
> The server is listening on port 25, 587 and 465
> netstat -plutn | grep 25 and 587
> tcp0 0 127.0.0.1:250.0.0.0:* LISTEN
> 28704/master
> tcp0 0 127.0.0.1:587 0
On Fri, December 25, 2020 12:43, John Stoffel wrote:
>
> Why don't you setup a local only postfix instance on the same host as
> the application, which only listed on 127.0.0.1:25, which the dumb
> Java app can then send email through *without encryption*, then let
> the local postfix instance
On 12/29/2020 7:37 AM, Rafael Azevedo wrote:
Hi there,
I've noticed that one of our servers is receiving a huge amount of
unauthorized requests.
User connects to our server and tries to send an email to any
destination. Our servers denies the message because user is not
authenticated. Then,
Ignacio Garc?a:
> Hello there, and thanks so much for your help
>
>
> I've got a web+mail server in the same machine. PHP's mail function is
> disabled, but other 3rd party functions such as PHPMailer can use
> sendmail to potentially send emails, as if I was invoking it from a shell
>
> echo
Hi there,
Thanks for the reply.
Yes I do:
smtpd_recipient_restrictions =
permit_sasl_authenticated,
permit_mynetworks,
reject_unknown_reverse_client_hostname,
reject_unknown_client_hostname,
reject_unknown_sender_domain,
reject_non_fqdn_recipient,
reject_unauth_destination,
#rejec
Hi Kevin,
I think this might be related to a customized content filter after queue
that we have.
How should the content filter answer in case we don't want to accept the
message neither for bounces or to the delivery queue?
Huge thanks!
Em ter., 29 de dez. de 2020 às 11:31, Kevin A. McGrail
escre
Rafael Azevedo:
> Hi Kevin,
> I think this might be related to a customized content filter after queue
> that we have.
> How should the content filter answer in case we don't want to accept the
> message neither for bounces or to the delivery queue?
> Huge thanks!
Options:
- Run it as a before-qu
Guys,
According to this referente [1], one of the principal operations is to
discard or quarantine the message.
How should the MAIL FILTER respond to postfix so it could do such actions?
Huge thanks,
BR,
Rafael
[1] - http://www.postfix.org/FILTER_README.html
Em ter., 29 de dez. de 2020 às 09:37
Hi Wietse,
Thanks for the help !
I've just asked in another message about how to proceed in the "otherwise"
option.
I'm trying to quarantine the message and don't really know how to do it.
Any help would be appreciated.
Thanks once again.
BR,
Rafael
Em ter., 29 de dez. de 2020 às 15:16, Wietse Ve
Rafael Azevedo:
> Guys,
> According to this referente [1], one of the principal operations is to
> discard or quarantine the message.
> How should the MAIL FILTER respond to postfix so it could do such actions?
EHLO blah
250 ok
MAIL FROM:
250 ok
RCPT TO:
250 ok
DATA
351 blah
header
body
.
250 ok
Q
Rafael Azevedo:
> Hi Wietse,
> Thanks for the help !
> I've just asked in another message about how to proceed in the "otherwise"
> option.
> I'm trying to quarantine the message and don't really know how to do it.
> Any help would be appreciated.
Add a header that says this is spam, then use a ma
> "James" == James B Byrne writes:
James> On Fri, December 25, 2020 12:43, John Stoffel wrote:
>>
>> Why don't you setup a local only postfix instance on the same host as
>> the application, which only listed on 127.0.0.1:25, which the dumb
>> Java app can then send email through *without e
On 30/12/2020 2:38 am, ludic...@gmail.com wrote:
@Nick
A check for a valid FQDN in From is in smtpd_sender_restrictions.
At the point where it got to bounce message, SPF was skipped. Would
OpenDMARC then still work?
The smtpd_sender_restrictions that you specify are applied to the
/envelope
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