troubleshooting Question

Are there special considerations for opening port 587 on a firewall?

Avatar of tmaususer
tmaususer asked on
11 Comments2 Solutions169 ViewsLast Modified:
Our ISP has required us to switch our SMTP traffic from port 25 to 587.  (Interesting note: We are a business with a business account.)

I have duplicated the STMP configuration lines in our firewall, replacing “SMTP” with “587”.  I think the port is now open.  

Someone claims they are not seeing traffic sent on port 587, and has asked us to prove it is not an issue on our firewall.  We are receiving traffic on port 587.  

Would there be additional steps after opening the port such as setting some kind of authentication or encryption in the firewall for port 587?
Join our community to see this answer!
Unlock 2 Answers and 11 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 2 Answers and 11 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros