Question Require SMTPS on Dovecot

[fmdeveloper]

Server operating system version

Ubuntu 22.04.5 LTS

Plesk version and microupdate number

Plesk Obsidian v18.0.79_build1800260720.04

Currently running Dovecot on Ubuntu 22.04.5 LTS. The cyber insurance company is flagging the server for running "Email Service without SSL/TLS." The server is set up to send through a specific IP, and the IP being flagged is a site IP. Is there any way to either a) block the site IP from responding to port 25, or b) require all SMTP traffic to be over SSL/TLS? SSL/TLS is enabled on the service.

Thanks in advance.

 

[scsa20]

Dovecot is use for IMAP/POP3. For SMTP the default service is usually Postfix but it's possible you are using Qmail. You can check under Services Management for SMTP Server.

In either case, by default, Postfix should be using TLS on port 25 when communicating but to enforce it to only do that requires manual configuration iirc. Not sure about Qmail since I've never used it before.

 

[fmdeveloper]

Dovecot is use for IMAP/POP3. For SMTP the default service is usually Postfix but it's possible you are using Qmail. You can check under Services Management for SMTP Server.

In either case, by default, Postfix should be using TLS on port 25 when communicating but to enforce it to only do that requires manual configuration iirc. Not sure about Qmail since I've never used it before.

Using Postfix. I'll see if I can find a guide on enforcing TLS on Postfix.