Hello,
I hvae a question about dealing with locally generated email (non
delivery notifications) with an empty sender address.
I am running postfix 3.8.5 on my 'dialup' box. It is used to deliver
my email by smtp via a relay host. I submit outgoing email with a user
settable envelope address (I do no sender address rewriting for
outgoing email).
But if there are bounces because the email is rejected by the relay,
(a typo in the domain of the recipient address, for example...) things
get weird. See the log snipplet below.
Apparently, postfix creates a non delivery notification for the
rejected email. This has an empty sender address, and actually it
should be go back to me, in my local mailbox and not send to any node
outside.
But postfix offers this non delivery notification to the relay, which
rejects it, this time for having a empty sender address.
Now, postfix seems to discard the email silently, at least I didn't
find it anywhere.
I think postfix should deliver such emails only local, not to a relay
host, even if the recipient address is a vaild, routable email
address. But I didn't find out how to configure such a rule.
BTW., aliases for root/postmaster/MAILER-DAEMON are set up,
Any hint is welcome.
Thanks in advance,
N.
P.S.:
Just for being complete: I've set up sender dependent relaying. Email
with a from adress "@lewonze.de" is send via variomedia.de, the rest
is sent via gmx.de. For straightforward cases, this works well. I
don't think that this plays a role here.
In short, my setting in main.cf look like this:
# grep -v "#\|^$" main.cf
compatibility_level = 3.7
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
unknown_local_recipient_reject_code = 550
alias_maps = hash:/etc/postfix/aliases
alias_database = $alias_maps
debug_peer_level = 2
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail
newaliases_path = /usr/bin/newaliases
mailq_path = /usr/bin/mailq
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/share/man
sample_directory = /etc/postfix
readme_directory = no
meta_directory = /etc/postfix
shlib_directory = /usr/lib64/postfix/${mail_version}
mail_spool_directory = /var/mail
smtp_sasl_security_options = noplaintext, noanonymous
smtp_sasl_tls_security_options = noanonymous
smtp_sender_dependent_authentication = yes
sender_dependent_relayhost_maps = hash:/etc/postfix/sender_relay
smtp_sasl_auth_enable = yes
smtp_tls_security_level = encrypt
smtp_sasl_tls_security_options = noanonymous
relayhost = mail.gmx.de
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
defer_transports = smtp
home_mailbox = Mail/inbox
mailbox_size_limit = 163840000
message_size_limit = 81920000
Here is the log snipplet:
Jun 23 22:50:02 schubert postfix/pickup[7287]: 60970354BC3: uid=1000
from=<x...@lewonze.de>
Jun 23 22:50:02 schubert postfix/cleanup[7776]: 60970354BC3:
message-id=<cfa208a9-4332-1e4c-9b36-36fd852a0...@gmx.de>
Jun 23 22:50:02 schubert postfix/qmgr[26673]: 60970354BC3:
from=<x...@lewonze.de>, size=471, nrcpt=1 (queue active)
Jun 23 22:50:02 schubert postfix/error[7782]: 60970354BC3:
to=<someth...@lewonzelewonze.de>, relay=none, delay=0.01, delays=0.01/0/0/0,
dsn=4.3.2, status=deferred (deferred transport)
Jun 23 22:50:11 schubert postfix/qmgr[26673]: 60970354BC3:
from=<x...@lewonze.de>, size=471, nrcpt=1 (queue active)
Jun 23 22:50:12 schubert postfix/smtp[7836]: 60970354BC3:
to=<someth...@lewonzelewonze.de>,
relay=smtp.variomedia.de[2a00:1c38:1:1:511c:e01c::]:25, delay=9.8,
delays=9.1/0.04/0.64/0.08, dsn=5.0.0, status=bounced (host
smtp.variomedia.de[2a00:1c38:1:1:511c:e01c::] said: 550 Unrouteable address
(in reply to RCPT TO command))
Jun 23 22:50:12 schubert postfix/cleanup[7776]: 3DBEA354BC8:
message-id=<20240623205012.3DBEA354BC8@schubert.localdomain>
Jun 23 22:50:12 schubert postfix/bounce[7837]: 60970354BC3: sender
non-delivery notification: 3DBEA354BC8
Jun 23 22:50:12 schubert postfix/qmgr[26673]: 3DBEA354BC8: from=<>, size=2533,
nrcpt=1 (queue active)
Jun 23 22:50:12 schubert postfix/qmgr[26673]: 60970354BC3: removed
Jun 23 22:50:12 schubert postfix/error[7782]: 3DBEA354BC8:
to=<x...@lewonze.de>, relay=none, delay=0, delays=0/0/0/0, dsn=4.3.2,
status=deferred (deferred transport)
Jun 23 22:50:27 schubert postfix/qmgr[26673]: 3DBEA354BC8: from=<>, size=2533,
nrcpt=1 (queue active)
Jun 23 22:50:27 schubert postfix/smtp[7836]: 3DBEA354BC8:
to=<x...@lewonze.de>, relay=mail.gmx.de[212.227.17.168]:25, delay=16,
delays=15/0/0.76/0.05, dsn=5.0.0, status=bounced (host
mail.gmx.de[212.227.17.168] said: 550-Requested action not taken: mailbox
unavailable 550 Sender address is not allowed. (in reply to MAIL FROM
command))
Jun 23 22:50:27 schubert postfix/qmgr[26673]: 3DBEA354BC8: removed
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