[CentOS] Mail has quit working

Alexander Dalloz
2018-08-26T19:45:44Z

Am 26.08.2018 um 20:48 schrieb TE Dukes:
>> You see a basic error message "Could not connect to
localhost:143". So
>> test that without using additional software. Foremost consult the
>> maillog, in this case the log content produced by dovecot. And test
>> connectivity on the lowest level.
>>
>> echo QUIT | openssl s_client -connect localhost:143 -starttls imap
> I'm getting what appears to be help file with various options when
trying to
> run the above commad

Can we guess that you don't offer TLS for IMAP connections?

>> That must be successful first. You can too test "lsof -i
:143" or "ss
>> -tulpen | grep 143". And tail your maillog.
>>
> Running lsof -i :143, I get:
>
> COMMAND  PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
> dovecot 1576 root   37u  IPv4  32014      0t0  TCP *:imap (LISTEN)
> dovecot 1576 root   38u  IPv6  32015      0t0  TCP *:imap (LISTEN)
>
> Running ss -tulpen | grep 143 :
>
> tcp    LISTEN     0      100       *:143                   *:*
> users:(("dovecot",pid=1576,fd=37)) ino:32014 sk:ffff913e953e2e80
<->
> tcp    LISTEN     0      100      :::143                  :::*
> users:(("dovecot",pid=1576,fd=38)) ino:32015 sk:ffff913b2e90a100
v6only:1
> <->

So port 143 is listening. Are we back to the point that your DNS or NSS
is broken so that even

telnet localhost 143

fails while

telnet 127.0.0.1 143

is successful?

> Thanks!!

Alexander