[Last Call] Learn how to a build a cloud-first strategyRegister Now


SBS 2008 - cannot connect pop and smtp from outside network

Posted on 2009-02-21
Medium Priority
Last Modified: 2012-05-06
I CAN connect pop with SSL on port 995 - working - but no matter what I do I CANNOT get SMTP to authenticate
Question by:olygraham
  • 2

Expert Comment

ID: 23703457
how are you trying to authenticate?  SMTP does not really authenticate unless you are using EHLO commands.  Do you mean that you are trying to gain access to email from outside of the network (to the inside)?  OWA?  RPC over HTTP?  Are you sure ISA is configured correctly?  Can you telnet to the DNS name to port 25:

telnet servername 25


Author Comment

ID: 23703467
I found out Trendmicro on the server with email reputation for spam - but not going externally) is blocking.  I have mail client outside of netowkr using 25 and 110 - and I need to pop from anywhere so I can't just add ip's on and on and on

Accepted Solution

olygraham earned 0 total points
ID: 23703532
Trendmicro email reputation - PREVENTS external to LAN Email clients from SMTP authentication as well as forces a port 995 / SSL POP in order to work.  Turn OFF Email Reputation in Trend Advanced Security - port 25 and 100 work perfectly out of network

Featured Post

Veeam and MySQL: How to Perform Backup & Recovery

MySQL and the MariaDB variant are among the most used databases in Linux environments, and many critical applications support their data on them. Watch this recorded webinar to find out how Veeam Backup & Replication allows you to get consistent backups of MySQL databases.

Question has a verified solution.

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

Introduction: Sometimes when I receive a call from my users to solve their problems it is very difficult for me to found their computer IP address. Even finding their computer Host to provide remote support can be a problem.  So I resorted to Goo…
Experts-Exchange users below are the steps you can follow to upgrade your Lync server to latest CU's or cumulative updates. Note: Perform it during non-production hours.   Step 1: Backup your lync and SQL server database. Follow below article: h…
Look below the covers at a subform control , and the form that is inside it. Explore properties and see how easy it is to aggregate, get statistics, and synchronize results for your data. A Microsoft Access subform is used to show relevant calcul…
Is your OST file inaccessible, Need to transfer OST file from one computer to another? Want to convert OST file to PST? If the answer to any of the above question is yes, then look no further. With the help of Stellar OST to PST Converter, you can e…
Suggested Courses

831 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