Can't receive mails from external accounts

Support and Discussion General Discussion
1

Hello everybody !!

I would like get some help on a mail issue. Any help would be appreciated. :slight_smile:

I just installed a fresh new CyberPanel environment on a VPS running centOS7.
My CyberPanel version is 2.1.2 and after this upgrade i can’t receive mails from external accounts anymore. I can send and receive mails between accounts in my domains, but mails sent from external domains/accounts (gmail or hotmail for example) are rejected and sender receive a “service unavailable” message.

Looking for something wrong into system log, i found this:
sendmail[22173]: STARTTLS=client, relay=[127.0.0.1], version=TLSv1/SSLv3, verify=FAIL, cipher=ECDHE-RSA-AES256-GCM-SHA384, bits=256/256
My guess is that message refers some SSL issue…

After spent many hours looking for some light over this on web, i found this article:
https://community.cyberpanel.net/docs?category=14&topic=108
so i decided follow it, and bellow are some considerations:

1 - Postfix are running fine in my system

Postfix_Status
Postfix_Status1832Ă—1006 110 KB

2 - I enabled system debug as suggested here:

And analising messages on erro-logs.txt i could observe that the system wasn’t able to create a self-signed certificate for mail domains… bellow image about it generated when i tried to create a self signed certificate for a mailserver.

Erro - Tela01
Erro - Tela011874Ă—274 14.8 KB

Well, could you please help me on this issue?

2

Generate letsencrypt ssl instead of self signed ssl.
Under websites menu of cyberpanel, click on List domains and then select the relevant mail subdomain and click on issue ssl.

3

Thanks a lot die2mrw007 for your reply !!

Using issue ssl on domains list i could generate a valid ssl for mail domains with no more error messages… it’s ok. However, i still isn’t able to see arriving mails on mail boxes, the problem persist.

When i send a message from hotmail, for example, to my domain boxes (any), i still see the follow message into error log:

sendmail[623982]: STARTTLS=client, relay=[127.0.0.1], version=TLSv1/SSLv3, verify=FAIL, cipher=ECDHE-ECDSA-AES256-GCM-SHA384, bits=256/256

Any idea about ??

4

After doing the changes have you restarted postfix and dovecot?
Try restarting the whole server by sudo reboot command and see if that solves.