Pix 506E appears to be blocking SMTP all of the sudden?

Posted on 2004-11-23
Medium Priority
Last Modified: 2010-04-09
For some reason late last night we weren't able to send mail to our smtp server... it just timed out... i originally thought it was the mail server - but it's running fine inside our network - i can send smtp all day long.  So i'm lead to believe it may be the pix... however i haven't changed anything in our config in a long time and everything has been smooth, i tried restarting the pix and still no go.... the smtp & pop3 are the same machine, and the users can download all of their email, just smtp times out...  any ideas- it seems to be a network issue somewhere?

Question by:NickUA
LVL 79

Accepted Solution

lrmoore earned 2000 total points
ID: 12660307
Did your ISP change anything? Did they start blocking port 25?
If it's been working fine and no configuration changes have been made, then it is most likely not the PIX.
If ANY configuration change was made, then I would suspect a typo or something.
Did anything change on the server? Did anyone disable smtp relay? Does it require a valid login to send mail?
Do you receive email from external sources?
The problem is only with POP3 clients not being able to send mail, although they can receive mail OK?

Author Comment

ID: 12698694
lrmoore you are correct...Cox started wanting their customers to use their smtp server.

Problem Solved.

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

During and after that shift to cloud, one area that still poses a struggle for many organizations is what to do with their department file shares.
Considering cloud tradeoffs and determining the right mix for your organization.
As a trusted technology advisor to your customers you are likely getting the daily question of, ‘should I put this in the cloud?’ As customer demands for cloud services increases, companies will see a shift from traditional buying patterns to new…
Both in life and business – not all partnerships are created equal. Spend 30 short minutes with us to learn:   • Key questions to ask when considering a partnership to accelerate your business into the cloud • Pitfalls and mistakes other partners…
Suggested Courses
Course of the Month17 days, 8 hours left to enroll

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question