SMTP timeout after initial connection

Hi there. Im having problems getting email to work on my new CPanel instance. The emails in question are able to recive, but can not send out emails at all. Error from exim_mainlog 2023-09-05 10:00:36 1qdSrN-000Fsa-11 Sender identification U=CpanelUser D=XXXXXXX.no S=kamera1@XXXXXXXXX.no 2023-09-05 10:00:36 1qdSrN-000Fsa-11 SMTP connection outbound 1693908036 1qdSrN-000Fsa-11 XXXXXXX.no xxxxxxxxxxxx@hotmail.com 2023-09-05 10:00:51 1qdSnO-000Ff3-1J H=ALT4.ASPMX.L.GOOGLE.COM [xxx.xxx.xxx.xx]: SMTP timeout after initial connection: Connection timed out 2023-09-05 10:01:07 SMTP connection from [127.0.0.1]:49408 (TCP/IP connection count = 2) 2023-09-05 10:01:07 SMTP connection from (localhost) [127.0.0.1]:49408 closed by QUIT What i've tried so far: Disabling firewall. Changing exim listning port to 26 (also added to firewall) # telnet my-server-ip 25 / Connection to my-server-ip:25 - ok The server is hosted with Hetzner, with no external network firewall. trying to telnet from my server to a random email server is timing out, so i assume its a problem with outgoing connections on port 25, but that does not make sense either as it still fails with firewalld disabled.

cPRex Jurassic Moderator

September 05, 2023 17:24

Hey there! Your hosting provider likely has port 25 blocked. You'd either need to ask them to open it, or configure a smarthost to workaround that limitation:

JayConsulting

September 05, 2023 18:24

September 05, 2023 19:16

Port 26 is for Exim to *listen* on - that means incoming connections to your server. This is helpful when someone has a home office where their ISP blocks port 25 to help stop spam so they can connect to your server. This doesn't affect outgoing mail from your machine - even if you could change that port (I suppose you technically can hack Exim to change it) every other server in the world will only be listening on port 25.

SMTP timeout after initial connection

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