Email sent successfully but not receive

[Editps]

Hi,
In my Google VM instance, I utilized the Vestacp management panel. When I send an email, it shows that it was sent successfully, but the recipient does not get it. Please assist me with any solution.
Thanks
Jony

[sandro]

It's hard to understand the problem with just a description.

Could you share the log (/var/log/exim/mail.log) showing the message being sent, the result of the command "exim -bp", etc?

When you send an external email to the server, is the message delivered to the inbox?

[Editps]

How do I check the log??

[sandro]

You can check the /var/log/exim/mail.log file using the "cat" or "tail" command.

For example, "tail -n 60 /var/log/exim/mail.log" will show the last 60 lines of the file.

Using "tail -f /var/log/exim/mail.log" you will see messages from the SMTP service in (more or less) real time.

On Ubuntu it may be that the "mail.log" file is in another directory, such as /var/log/exim4.

Attention: If you're not a sysadmin I think you'd better hire one.

[Editps]

I'm using ubuntu and what command will i run? I can access by ssh... please help me.
Thanks!

[sandro]

The first thing is to find the mail.log file.

Access the server via ssh and go to the /var/log/exim directory.

# cd /var/log/exim
or
# cd /var/log/exim4

If the command runs correctly, then run:

# ls

See if the mail.log file is shown.

If all goes well, run:

# tail -f mail.log

And try sending an email... All events will be shown on the screen.

Then share the results here.

[Editps]

please have a look:

root@app:/var/log/exim4# ls
mainlog mainlog.10.gz mainlog.3.gz mainlog.5.gz mainlog.7.gz mainlog.9.gz rejectlog.1 rejectlog.2.gz rejectlog.4.gz rejectlog.6.gz rejectlog.8.gz
mainlog.1 mainlog.2.gz mainlog.4.gz mainlog.6.gz mainlog.8.gz rejectlog rejectlog.10.gz rejectlog.3.gz rejectlog.5.gz rejectlog.7.gz rejectlog.9.gz
root@app:/var/log/exim4# tail -f mail.log
tail: cannot open 'mail.log' for reading: No such file or directory
tail: no files remaining
root@app:/var/log/exim4#

[sandro]

On your system the filename is mainlog.

Then, run the command "tail -f mainlog" and do a test email sending.

Share the results here.

[Editps]

root@app:/var/log/exim4# tail -f mainlog
2021-11-23 06:23:12 1mpPAr-0002oP-SD == [email protected] R=dnslookup T=re mote_smtp defer (110): Connection timed out
2021-11-23 06:23:12 1mpPAr-0002oP-SD ** [email protected]: retry timeout e xceeded
2021-11-23 06:23:12 1mpPCy-0002su-Ph <= <> R=1mpPAr-0002oP-SD U=Debian-exim P=lo cal S=1932
2021-11-23 06:23:12 1mpPAr-0002oP-SD Completed
2021-11-23 06:23:13 1mpPCy-0002su-Ph => cs <[email protected]> R=localuser T=local_d elivery
2021-11-23 06:23:58 1mpPDi-0002tQ-Qy <= [email protected] H=localhost (editps.com) [ 127.0.0.1] P=esmtpa A=dovecot_login:[email protected] S=725 id=f8aa927e85bbaa59bf450 [email protected]
2021-11-23 06:23:58 1mpPDi-0002tQ-Qy ** [email protected] R=dnslookup T=re mote_smtp: all hosts for 'dinamicostudio.com' have been failing for a long time (and retry time not reached)
2021-11-23 06:23:58 1mpPDi-0002tX-Vj <= <> R=1mpPDi-0002tQ-Qy U=Debian-exim P=lo cal S=2002
2021-11-23 06:23:58 1mpPDi-0002tQ-Qy Completed
2021-11-23 06:23:59 1mpPDi-0002tX-Vj => cs <[email protected]> R=localuser T=local_d elivery

[sandro]

This is a firewall issue.

Your server is trying to connect to smtp server from dinamicostudio.com domain, but it is getting connection refused message.

As an initial test, stop your server's firewall service and see if the error repeats.