> On 17/07/2023 12:37 EEST Wolfgang Paul Rauchholz <wp.rauchh...@gmail.com> 
> wrote:
> 
> 
> I run my home server under Rocky Linux 9. The server is modem / router and as 
> such has two firewall interfaces; internal and external.
> Dovecot version isdovecot-2.3.16-8.el9.x86_64
> kernel is: 5.14.0-284.18.1.el9_2.x86_64
> My domain is wo-lar.com (http://wo-lar.com)
> Postfix and Dovecot are up and running, and I can send and receive emails 
> from CLI.
> But I cannot connect from desktop clients. I get the following error message: 
> Server message: Can't connect to host "tcp://wo-lar.com:143 
> (http://wo-lar.com:143)"
> 
> 
> I tried to telnet from my desktop and server. Results are the same:
> 
>   * I always get a connection refused: telnet wo-lar.com (http://wo-lar.com) 
> 143 telnet / telnet <Server LAN IP> 143. On server only: telnet 127.0.0.1 143
>   * telnet wo-lar 143 (without .com!) establishes aconnection
>     [root@home wp.rauchholz]# telnet wo-lar 143
>     Trying 79.152.236.25...
>     Connected to wo-lar.
>     Escape character is '^]'.
>     OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ 
> STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot ready.
> 
> I went through all kinds for conf files and search for wo-lar string, but 
> can't find it anywhere
> Where is the mistake hiding?
> Thanks for helping.
> 
> Wolfgang

What is your `listen` setting in dovecot.conf?

you can check with `doveconf listen`

Aki
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