I've got a fax machine converting inbound faxes to PDFs and sending them to my email. My ISP is now blocking port 25 on their entire network, no exceptions. Port 25 is fixed in the fax firmware and ...

Larry Seltzer of eWeek, whom I have great respect for and usually agree with, wrote this article on dealing with spam using the controversial tactic of blocking all outbound port 25 access.? The logic ...

Internet service provider YouFibre, which is one of the main retail outlets for Netomnia's growing national ...

If I need to redirect the mail coming in on SMTP port 25 to a program which is running and listens to on port 2025, is there a way to create a "port tunnel" ...

Verizon is one of the many Internet Service Providers that require you to authenticate when sending mail. The purpose of SMTP authentication is to reduce email spamming and abusive mailing behaviors.