Have you checked your firewall and server iptables block smtp port 25 or 587 if any
Sent from my iPhone > On 28 Aug 2021, at 4:18 AM, Edgar Ignacio Vivas Zamorano > <[email protected]> wrote: > > Yes, my DNS server resolve my ip in the mail server, this problem init > when my ip server blacklisted two days ago, but i modify some dns > parameters and not listed now in any blacklist > > my two servers not delivery any mail. > > >> On Fri, 2021-08-27 at 13:56 -0600, Eric Broch wrote: >> Do you know the IP address to which you're email server is trying to >> connect? >> >> Does your email server resolve the domain name properly. >> >>> On 8/27/2021 1:50 PM, Edgar Ignacio Vivas Zamorano wrote: >>> hello i have this error >>> >>> delivery 18: deferral: >>> sorry,_I_wasn't_able_to_establish_an_SMTP_connection._(#4.4.1)/ >>> >>> my ip not listed in any blacklist. >>> >>> i have two mail servers with the same configuration and not >>> delivery >>> any message. >>> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: >> [email protected] >> For additional commands, e-mail: >> [email protected] >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
