Recently i faced same kind of issue while sending email from the windows outlook client.
Note: This error particularly occurred while sending email via outlook desktop application.
Below is the Error message found in /var/log/mail.log while sending emails from outlook agent.
NOQUEUE: reject: RCPT from unknown[XXX.XXX.XXX.XXX]: 450 4.7.1 <DESKTOPOABC123>...
I could solve the problem by telling mailman to always remove the DKIM signature:
# Some list posts and mail to the -owner address may contain DomainKey or
# DomainKeys Identified Mail (DKIM) signature headers <http://www.dkim.org/>. ...
I had to restart the IMAP service. In my case:
sudo systemctl restart dovecot
Apparently, I forgot to restart the service the last time the certificate was renewed.
This was particularly tricky to find, because I did not renew the certificate lately and thus did not link this issue to an earlier renewal at all.
Thanks to Gerald Schneider and Bob for the ...
So, although dig requests (e.g.dig @localhost a 188.8.131.52.zen.spamhaus.org) were returning expected results, leading me to assume there was no network/DNS issue, I did find in my OpenDNS dashboard some evidence of spamhaus and spamcop DNS requests being blocked. There was no reason given and at the time of checking there was no category associated with ...
looks like it is a regular directory,
rm -rf /home/user/Maildir
and POSTFIX will recreate the symlinks for you.
if you want manually to create it manually
Dovecot has no relevance to postfix not listening on port 25. They're two completely separate programs and one has no affect on the functionality of the other.
The simple way of explaining it is this:
Dovecot handles POP3 (110, 995) and IMAP (143, 993) ports for checking mail and postfix handles the SMTP ports (25, 465, 587) for sending mail. Note that ...
I think you got (at least) two problems. Your MX record is likely unintended:
mail.servicemouse.com. 3266 IN MX 2 servicemouse.com.
I suspect you meant to configure the server called "mail" as the exchange for the unprefixed domain, not the other way around. Usually MX records are setup like this in a zone file:
@ 3600 IN MX 2 mail....
We have also seen this from some of our Linode mail relays.
The problem we've found seems to be down to sending mail from European relays to Microsoft 365 accounts also hosted in Europe. If we route mail to them via the US we don't see the bounces.
We've raised this with Microsoft and have a ticket outstanding with them.
Other linode users are seeing this ...
I have run into this issue but not with Postfix, but with SSH (openssh <6.2). I found out this post on SO that was related to the issue I had: https://stackoverflow.com/questions/66770798/awss-proxy-protocol-v2-breaking-application-due-to-absence-of-psh-flag. The answer posted there by dade describes a feature flag that you can set on the target group ...
As noted in the previous answer, the variable smtp_sasl_password_maps only applies to SMTP and not SMTPD. Would that the solution were as simple as pointing Postfix SMTPD to a file.
The previous answer cited what seems like an unnecessary of documentation for the problem of specifying pairs of usernames and passwords to a server. It would be nice if Postfix ...
In principle, if you have something in the queue, you may find a list of such mail via
which tells you IDs. Then, for each ID, you may print a complete body of that email with
postcat -q <ID>
And if you decide to delete a message,
postsuper -d <ID>
However, in your case you have nothing in the queue, so nowhere you can get the ...
The DomainKeys standard was never implemented, at least not through RFC. RFC 4870 even states at the very top:
Status of This Memo
This memo defines a Historic Document for the Internet community.
It does not specify an Internet standard of any kind.
It was obsoleted by RFC 4871 and both RFCs are dated May 2007.
A Maildir is simply a directory that has the cur, tmp and new subdirectories.
IMAP Folders are usually simply subdirectories inside the main Maildir whose names start with a period, and which in turn are themselves Maildirs. They must also contain a zero-length file named maildirfolder. See http://www.courier-mta.org/maildir.html
That makes it trivial to ...
If the issue is in fact a reverse proxy that you can't block the source IP of for fear of blocking legitimate traffic, then perhaps the reverse proxy you're using can block the IP, and you can use Fail2ban to block that address using an API (in some cases). One such case is Cloudflare, which already has Fail2ban actions for such a purpose, using firewall ...
Clearly, postgres was not listening on the socket:
Also the ls -l /var/run/postgresql/ gives the following:
drwxr-s--- 2 postgres postgres 120 Ιούν 29 18:06 9.4-main.pg_stat_tmp
-rw-r--r-- 1 postgres postgres 4 Ιούν 29 17:20 9.4-main.pid
To enable the socket endpoint, configure unix_socket_directories in postgres conf (and make sure that the server is ...