Server only receiving mails no sending

I tray to send mail to my server from another server and I received it but when trayed to send mail it always retry timeout exceeded
I run tail -f /var/log/exim_mainlog
and the log :- [CODE=bash]2021-04-30 10:25:52 1lcQLI-000816-Ch <= admin@example.com H=(server.example.com) [::1]:55506 P=esmtpa A=dovecot_login:admin@example.com S=561 id=3d6e1b444089ca9430d37a94307754bb@example.com T="Test" for example@yahoo.com 2021-04-30 10:25:52 SMTP connection from (server.example.com) [::1]:55506 closed by QUIT 2021-04-30 10:25:52 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1lcQLI-000816-Ch 2021-04-30 10:25:52 1lcQLI-000816-Ch Sender identification U=example D=example.com S=admin@example.com 2021-04-30 10:25:52 1lcQLI-000816-Ch SMTP connection outbound 1619778352 1lcQLI-000816-Ch example.com example@yahoo.com 2021-04-30 10:26:54 SMTP connection from [127.0.0.1]:55290 (TCP/IP connection count = 1) 2021-04-30 10:26:56 SMTP connection from [127.0.0.1]:55290 closed by QUIT 2021-04-30 10:26:56 SMTP connection from [127.0.0.1]:41526 (TCP/IP connection count = 1) 2021-04-30 10:26:56 SMTP connection from (localhost) [127.0.0.1]:41526 closed by QUIT 2021-04-30 10:27:15 SMTP connection from [50.116.48.41]:61000 (TCP/IP connection count = 1) 2021-04-30 10:27:17 TLS error on connection from [50.116.48.41]:61000 (SSL_accept (TLSv1.2)): error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol 2021-04-30 10:27:59 1lcQLI-000816-Ch H=mta5.am0.yahoodns.net [67.195.204.79] Connection timed out 2021-04-30 10:30:07 1lcQLI-000816-Ch H=mta5.am0.yahoodns.net [67.195.204.74] Connection timed out 2021-04-30 10:32:14 1lcQLI-000816-Ch H=mta5.am0.yahoodns.net [98.136.96.76] Connection timed out 2021-04-30 10:32:14 SMTP connection from [127.0.0.1]:55338 (TCP/IP connection count = 1) 2021-04-30 10:32:16 SMTP connection from [127.0.0.1]:55338 closed by QUIT 2021-04-30 10:32:16 SMTP connection from [127.0.0.1]:41574 (TCP/IP connection count = 1) 2021-04-30 10:32:16 SMTP connection from (localhost) [127.0.0.1]:41574 closed by QUIT 2021-04-30 10:33:03 SMTP connection from [50.116.48.41]:61000 (TCP/IP connection count = 1) 2021-04-30 10:33:05 SMTP connection from li393-41.members.linode.com [50.116.48.41]:61000 lost D=1s 2021-04-30 10:34:21 1lcQLI-000816-Ch H=mta5.am0.yahoodns.net [98.136.96.91] Connection timed out 2021-04-30 10:36:28 1lcQLI-000816-Ch H=mt2021-04-30 10:24:23 SMTP connection from [41.69.148.234]:32699 lost D=30s 2021-04-30 10:36:52 cwd=/var/spool/exim 2 args: /usr/sbin/exim -q 2021-04-30 10:36:52 Start queue run: pid=31222 2021-04-30 10:36:52 1lcQLI-000816-Ch Spool file for 1lcQLI-000816-Ch is locked (another process is handling this message) 2021-04-30 10:36:52 End queue run: pid=31222 2021-04-30 10:37:58 SMTP connection from [127.0.0.1]:55390 (TCP/IP connection count = 1) 2021-04-30 10:38:00 SMTP connection from [127.0.0.1]:55390 closed by QUIT 2021-04-30 10:38:01 SMTP connection from [127.0.0.1]:41626 (TCP/IP connection count = 1) 2021-04-30 10:38:01 SMTP connection from (localhost) [127.0.0.1]:41626 closed by QUIT 2021-04-30 10:38:35 1lcQLI-000816-Ch H=mta5.am0.yahoodns.net [67.195.228.106] Connection timed out 2021-04-30 10:40:43 1lcQLI-000816-Ch H=mta7.am0.yahoodns.net [67.195.204.73] Connection timed out 2021-04-30 10:42:50 1lcQLI-000816-Ch H=mta6.am0.yahoodns.net [67.195.228.94] Connection timed out 2021-04-30 10:42:50 1lcQLI-000816-Ch == example@yahoo.com R=dkim_lookuphost T=dkim_remote_smtp defer (110): Connection timed out 2021-04-30 10:42:50 1lcQLI-000816-Ch ** example@yahoo.com: retry timeout exceeded 2021-04-30 10:42:50 cwd=/var/spool/exim 7 args: /usr/sbin/exim -t -oem -oi -f <> -E1lcQLI-000816-Ch 2021-04-30 10:42:50 1lcQbi-0008AS-D8 <= <> R=1lcQLI-000816-Ch U=mailnull P=local S=1827 T="Mail delivery failed: returning message to sender" for admin@example.com 2021-04-30 10:42:50 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1lcQbi-0008AS-D8 2021-04-30 10:42:50 1lcQLI-000816-Ch Completed 2021-04-30 10:42:50 1lcQbi-0008AS-D8 => admin R=virtual_user T=dovecot_virtual_delivery C="250 2.0.0 h9xWHirfi2CsegAA/8vnGg Saved" 2021-04-30 10:42:50 1lcQbi-0008AS-D8 Completed 2021-04-30 10:43:23 SMTP connection from [127.0.0.1]:55438 (TCP/IP connection count = 1) 2021-04-30 10:43:25 SMTP connection from [127.0.0.1]:55438 closed by QUIT 2021-04-30 10:43:25 SMTP connection from [127.0.0.1]:41674 (TCP/IP connection count = 1) 2021-04-30 10:43:25 SMTP connection from (localhost) [127.0.0.1]:41674 closed by QUIT

cPRex Jurassic Moderator

May 03, 2021 15:33

Hey there! Can you try running this command from your server and pasting the output here? telnet mx1.cpanel.net 25

Asseriano

May 03, 2021 17:13

I got bash: telnet: command not found

May 03, 2021 17:53

Ah, I forget some servers don't have that by default :D It's a default package with the operating system, so you can run this to get that installed so you can perform the test: yum install telnet

May 03, 2021 17:55

I got: [CODE=bash]Loaded plugins: fastestmirror, universal-hooks Loading mirror speeds from cached hostfile * EA4: 185.15.22.168 * cpanel-plugins: 185.15.22.168 * rpmfusion-free-updates: mirror.serverion.com * rpmfusion-nonfree-updates: mirror.serverion.com No package telnet available. Error: Nothing to do

May 03, 2021 17:59

Can you let me know what operating system you are using?

May 03, 2021 18:07

CentOS Linux release 7.9.2009 (Core)

May 03, 2021 18:21

You may need to reach out to your hosting provider or datacenter as that server doesn't appear to have any of the default repositories configured, as I only see the cPanel and rpmfusion repos, and not anything related to the operating system itself. Without that, I would expect there to be odd behavior on the machine.

Server only receiving mails no sending

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