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My postal SMTP server works fine when tested on SMTPer, but it is not connecting to Email Application

4 Posts
4 Users
Posts: 1
Member Customer
Topic starter

Good day everyone and Hassan especially. Hassan for your great contribution to humanity through your many free and educative courses.

I was able to successfully install Postal SMTP on my VPS (gotten from Contabo). I tested the server on after i finished and the Postal installation.


But when i wanted to connect the mail server to a mailing application (Maxbulkmailer) it didn't connect. Tried it severally, but all efforts failed.


So I headed over to an online mailing application (Pabbly) to try connecting the mail server to their email sending platform, the email server didn't connect too and it responded with this error message below:

  • Delivery Sever Error: The following recipients failed:
          SMTP server error: 5.7.1 relaying denied for recipient in "RCPT TO:"
  • Looks like your credentials is invalid or blocked. Please contact to your SMTP service provider.

Also when i validated (using H-supertools email validator) the email I used to set-up my postal SMTP ( the validator responded with a message that my email is a "Bounce email"

Please help suggest any thing I need to look at again.


P.S: on my Postal mail server dashboard, all the DNS records were all ticked green, showing they were okay.


Posted : 02/01/2022 5:20 pm
tasnim reacted
Posts: 519
Noble Member Admin

How are you connecting? Are you using port 25? 

Please add screenshots for your connection. 

Posted : 03/01/2022 9:24 am
tasnim reacted
Posts: 1
Member Customer

can a code canon script be installed on Namecheap hosting

Posted : 04/01/2022 2:42 pm
Email Speed
Posts: 20
Member Customer

try to test postal to mautic or mailwizz

Posted : 07/01/2022 12:14 pm