[CentOS] Mail has quit working

[TE Dukes]

> -----Original Message-----
> From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of Alexander
> Dalloz
> Sent: Sunday, August 26, 2018 3:46 PM
> To: centos at centos.org
> Subject: Re: [CentOS] Mail has quit working
> 
> 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?
> 
I added this to /etc/postfix/main.cf from
https://access.redhat.com/solutions/120383

smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
smtpd_tls_protocols = !SSLv2, !SSLv3
smtp_tls_mandatory_protocols = !SSLv2, !SSLv3
smtp_tls_protocols = !SSLv2, !SSLv3


> >> 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

I think so. Everything else work, I don't get it.
> 
> telnet localhost 143
> 
> fails while
> 
> telnet 127.0.0.1 143
> 
> is successful?
> 

Yes, that is correct localhost fails but 127.0.0.1 responds.

Thanks