I recently encountered an issue with my project, which involves an SMTP connection and a system for sending verification codes. While everything worked flawlessly on my localhost setup, I ran into problems after uploading the project to a server.
Issue Details:
The verification code mail, which are crucial for user validation, are not being delivered after the project was moved to the server.
To diagnose the issue, I checked the logs but found them cluttered with numerous entries. In an attempt to simplify the analysis, I cleared the contents of the Exim4 and Dovecot logs, including mainlog, mainlog.1, rejectlog, rejectlog.1, and dovecot.log.
After clearing the logs I now have a new problem and exim4 is not working.
I’m seeking advice or suggestions on how to resolve this issue. Has anyone experienced a similar problem, or does anyone have insights on troubleshooting steps that could be effective in this scenario? Any guidance or assistance would be greatly appreciated.
2023-12-04 21:48:16 exim 4.95 daemon started: pid=18694, -q30m, listening for SMTP on port 25 (IPv4) port 587 (IPv4) and for SMTPS on port 465 (IPv4)
2023-12-04 21:48:16 Cannot open main log file “/var/log/exim4/mainlog”: Permission denied: euid=116 egid=122
2023-12-04 21:48:29 exim 4.95 daemon started: pid=19378, -q30m, listening for SMTP on port 25 (IPv4) port 587 (IPv4) and for SMTPS on port 465 (IPv4)
2023-12-04 21:48:29 Cannot open main log file “/var/log/exim4/mainlog”: Permission denied: euid=116 egid=122
now let’s come to our main problem. when I run the project with localhost, mail goes to the user after registration. but when I upload the project to the server, the mail does not go. I do not change any settings, I did not touch the smtp settings. what is the problem?
