Unable to send emails but test email works

Your software
My Mautic version is: Mautic-5
My PHP version is: 8.1.31
My Database type and version is: 8.0

Your problem
My problem is:

I deployed Mautic 5 in Coolify and the Email DSN and then “Send test email”, I went to the mailbox of the SMTP email account and the test email was in the inbox.

Now, I added a sample contact (which is my personal Gmail and my company email), I tried to send an email by “Send a custom email to ” and the log shows:

|| || |Test|Email sent|Today, 5:46 pm|

But the email is not sent. I have tried this many times to no avail.

How can I debug the problem? The Coolify service runs a few docker containers:

These errors are showing in the log:

(Cannot find error log)

Steps I have tried to fix the problem:

  1. Setup Email DSN test and then tried to manually send an email to a contact.

Hey, please go to your configuration, system info and then the mautic log and see what errors/warnings might be showing there.