Mails from root never delivered - sent to deferred queue

I'm trying to identify why mails from the server (ie. from scripts or website contact forms hosted on the same machine) are always sent to the deferred queue.
I've checked mail.log and syslog and can't see any reference to those emails. Please advise where I might see that?

Many thanks!



ISPConfig ver. 3.1dev
Ubuntu 18.04LTS

 

Hi Till and Jesse,
Please don't get me wrong, but I searched in mail.log using the exact message ID shown in postqueue -p and it was not found. The message is still sitting in the maildrop queue and I even generated a fresh message to ensure that it hadn't rotated of the logs and used that message id too, but not found!
I can find lines for all other messages but not those generated on the server.
One thing I just noticed in main.cf was

. Is that normal? According to this, no_address_mappings means

Another thought, is whether it is being put in the correct queue? Postcat -q shows "maildrop as the queue name

Code:

*** HEADER EXTRACTED maildrop/944794011D3 ***

. Is that correct?

 

I appreciate your help Jesse.
I mentioned that both scripts sending mail and websites sending are both affected. I figure if I fix it to send the mail of my script then that will fix the websites too. So in the script it's using the mail command to send mail. It seems that maybe it's only the mail command which isn't being logged (and is getting deferred) but I can't find any config files for it. The man page mentions /etc/mail.rc. This is the contents:

Code:

set ask askcc append dot save crt
ignore Received Message-Id Resent-Message-Id Status Mail-From Return-Path Via Delivered-To

Like I said, all other mail is logged. I don't think it's disabled. I'm not sure where it is set though for the mail command. Most strange.
The messages from the script are addressed to a proper full email address which exists and works and according to the output of postcat -q the sender is "root".
I'll keep looking

 

By the way, this is the output of postcat -q

Code:

root@s1:/# postcat -q 1F8EC4006C8
*** ENVELOPE RECORDS maildrop/1F8EC4006C8 ***
message_arrival_time: Tue Mar 15 23:11:35 2022
named_attribute: rewrite_context=local
sender_fullname: root
sender: root
*** MESSAGE CONTENTS maildrop/1F8EC4006C8 ***
To: [email protected]
Subject: s1.mydomain.info queue size: 1
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8bit

Mail count on s1.mydomain.info is 1
*** HEADER EXTRACTED maildrop/1F8EC4006C8 ***
recipient: [email protected]
*** MESSAGE FILE END maildrop/1F8EC4006C8 ***

 

Code:

root@s1:/# grep 1F8EC4006C8 /var/log/*
grep: /var/log/apache2: Is a directory
grep: /var/log/apt: Is a directory
grep: /var/log/clamav: Is a directory
grep: /var/log/dbconfig-common: Is a directory
grep: /var/log/dist-upgrade: Is a directory
grep: /var/log/installer: Is a directory
grep: /var/log/ispconfig: Is a directory
grep: /var/log/journal: Is a directory
grep: /var/log/letsencrypt: Is a directory

 

Sendmail doesn't seem to be installed. I could try installing it. Will need to be weekend job I think.
I ran the command you supplied:

Code:

root@s1:/# postconf | grep -E maillog\|syslog
syslog_facility = mail
syslog_name = ${multi_instance_name?{$multi_instance_name}:{postfix}}

I'm not sure what to expect as output.

 

Ah yes. I've got it. Thanks.

Code:

root@s1:/# which sendmail
/usr/sbin/sendmail