Mails Missing- Very serious issue

[tamarin]

Recently we have been facing issues with e-mails are in outlook sent items but not receiving on recipient end. My service provider saying, he went through the Cpanel logs and nothing shows as this.

This is happening frequently now.

Even the user does not get any bounce back or error message regarding sent e-mail failed but shows in outlook sent items.

Do you have any idea what is happening to those e-mails? how to troubleshoot to find out the cause of it.
If you want I will send my logs which was sent by my cpanel service provider.

Thanks in advance
Krishna

 

[triantech]

Krishna,

Try sending a test mail from webmail. Open a shell and check the exim logs to see if you get any errors
associated with the mail delivery.

# grep <recipient@doamain> /var/log/exim_mainlog | tail -30

 

[cPanelMichael]

Hello

Yes, please search the Exim logs for these emails with a command such as:

exigrep user@domain /var/log/exim_mainlog

Thank you.