You have heard me share information about the fiasco that Verizon created.  In case you haven’t heard, I’ll recap quickly.  In the name of fighting SPAM, Verizon decided that they would block ALL port 25 SMTP traffic on their network for all of their ISP customers.  That means that anyone and everyone that uses Verizon as their ISP (DSL, FIOS, Dial-up, etc) cannot use any third party mail server or service that is configured to use the industry standard port 25.  That’s just plain stupid, but I have complained about that already.

I was in a quandary with this one, or maybe a catch-22 is a better term.  If I didn’t do anything about this “problem” that Verizon created, then all the people that I host email services for that use Verizon as their ISP are now out of luck.  They can’t send mail through their (read: my) mail servers.  So, I can just change the port that sendmail listens on, right?  Yeah, I could, and then my Verizon tethered customers can send mail again … but, all my other customers that don’t use Verizon have to change their email client settings too, since they would still be sending through port 25.  OK, I didn’t want to go down that road.  I wanted to fix the problem with the least impact on everyone. Continue reading →