SPX encrypted email not being delivered.

Question

Encrypted email is not being delivered using the Outlook plug-in in test environment. I can see that the email server is not the problem. This is happening to all email addresses, but I am able to check a gmail account, and I don't see it sticking in spam filters, etc. It's not that the email is not encrypted, it just never arrives. Is there a particular format that I should check on the firewall?

This thread was automatically locked due to age.

sachingurung · Answer

Hi James, 
 The easiest way is to start the smtp.log with SSH to UTM and sending an SPX encrypted mail. Check if the mail is passed/allowed from the SMTP proxy in the logs. 
 To capture smtp logs, take SSH to UTM and execute: 
 cd /var/log 
 tail -f smtp.log | grep (email address of the sender) 
 Thanks