Hi,
Im new here in Digital Ocean.
I have installed Sentora Panel in my droplet (Ubuntu 14.04.3 x64), have configured a website and a e-mail.
This e-mail works fine on webmail, but i dont know what a have to do to make this work on client mails, like outlook.
Reading some topics here in digital ocean comunity, i’ve found a tip to add this line in master.cf:
submission inet n - n - - smtpd

But it didnt work..

A have a DNS entry:
mail.liderancadesaltoalto.com.br. 1800 IN A 162.243.231.77

Im trying with:
contato@liderancadesaltoalto.com.br
mail.liderancadesaltoalto.com.br
smtp.liderancadesaltoalto.com.br (also tried with mail.liderancadesaltoalto.com.br)
smtp port 587 (also tried with 25, and 465)
pop3 port 110 (also tried with 143)

Nothing worked…
Outlook says: Cant find email server....

i’m obviously doing something wrong…
Can some one help?

Tnhaks a lot

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2 answers

There are a couple next steps you can take to troubleshoot this.

Check if services are listening - You can use telnet to attempt to connect to an open port on a remote machine. For example:

telnet google.com 80

You can then use CTRL+c on Linux/Mac to exit out of the connection.

This will open a telnet connection to google.com on port 80 (the default http port). You’ll see google’s server return a prompt (waiting for a web browser to request a page). This same functionality can be used to check if your mail server is listening on the ports you think it is.

telnet mail.liderancadesaltoalto.com.br 25

The other possible reason for the error Outlook is giving you would be that the name it is being given is not resolving. mail.liderancadesaltoalto.com.br appears to be working properly. smtp.liderancadesaltoalto.com.br, however does not resolve (did you create a DNS record for this subdomain?)

Hi Ryanpq,

Thanks a lot for your answer, it really helped a lot.
Now its working!

But, only for learning, what a did, insert “submission inet n - n - - smtpd” in “master.cf” was right?
Its necessary? Or just create de smtp DNS record was enough?

Once again, thanks a lot!

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