Pentanet does not currently block any network traffic ports or protocols on business services.

Beginning September 2024, insecure SMTP connections on TCP port 25 outbound (i.e, from a subscriber towards a host on the internet) may be blocked on some residential services, as per modern best practice recommendations from the Messaging, Malware and Mobile Anti-Abuse Working Group (M3AAWG).

We highly recommend the use of SSL/TLS to connect to 3rd party mail servers and relays, which are generally also configured to accept SSL/TLS connections on port 465 or 587 as an alternative to using insecure port 25. For more information, please contact your email provider.