SMTP Authentication Port on Cisco PIX?

Posted on 2005-05-13
Medium Priority
Last Modified: 2013-11-16
Well my new firewall hasn't come in so I'm still stuck with this Cisco Pix 506E firewall.

I am having POP3 problems and the support staff is telling me it's my firewall.

I'm hosting POP3, if I TURN OFF SMTP Authentication on my mail server, my clients can Send/Recieve email no problem.

If I TURN ON SMTP Authentiation on my mail server, my clients can recieve mail but CAN NOT send mail.

YES, the email clients are configured with user/pass for server SMTP Authentication. I've tested myself.

Support staff says it's something to do with my firewall because I gave them access to the mail server and a test account.

So what do I need to open up besides 110?
Question by:fredmastro
  • 2
LVL 79

Accepted Solution

lrmoore earned 340 total points
ID: 13999695
Try disabling fixup smtp
  no fixup protocol smtp 25

Author Comment

ID: 14000093
yup that fixed it. Thanks!

Once again you have saved the day :)
LVL 79

Expert Comment

ID: 14000200
glad to help!


Featured Post

 The Evil-ution of Network Security Threats

What are the hacks that forever changed the security industry? To answer that question, we created an exciting new eBook that takes you on a trip through hacking history. It explores the top hacks from the 80s to 2010s, why they mattered, and how the security industry responded.

Question has a verified solution.

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

Use of TCL script on Cisco devices:  - create file and merge it with running configuration to apply configuration changes
As managed cloud service providers, we often get asked to intervene when cloud deployments go awry. Attracted by apparent ease-of-use, flexibility and low computing costs, companies quickly adopt leading public cloud platforms such as Amazon Web Ser…
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…
When cloud platforms entered the scene, users and companies jumped on board to take advantage of the many benefits, like the ability to work and connect with company information from various locations. What many didn't foresee was the increased risk…
Suggested Courses
Course of the Month14 days, 15 hours left to enroll

839 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