Solved

POP3 550 5.7.1 Error

Posted on 2009-05-05
2
251 Views
Last Modified: 2013-11-30
I have enabled POP3 on my exchange server which works perfectly internally.  I have opened the necessary port 110 on the Firewall and can telnet to port 110 from an external source.  From the outside using Outlook I pass all tests and have a checkmark where my outgoing server requires authentication is located.  I can pull down messages but can not send to an external domain.  Any Help?
0
Comment
Question by:tdn9999
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 

Author Comment

by:tdn9999
ID: 24304682
FYI...

My Exchange SMTP Relay Access is set to allow all computer which successfully authenticate to relay
0
 
LVL 65

Accepted Solution

by:
Mestha earned 250 total points
ID: 24305920
Port 110 is for POP3 only, when you are sending email it uses SMTP.
The authentication settings for SMTP need to be set specifically, and in the format of domain\user.

Although if this is Exchange 2003 or higher, why are you using POP3 anyway? Awful protocol. Preferred remote access solution is RPC over HTTPS/Outlook Anywhere.

Simon.
0

Featured Post

Enroll in May's Course of the Month

May’s Course of the Month is now available! Experts Exchange’s Premium Members and Team Accounts have access to a complimentary course each month as part of their membership—an extra way to increase training and boost professional development.

Question has a verified solution.

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

Pop culture is prime bait for hackers seeking to infect user’s computers and mobile devices with malicious malware. Hackers know exactly what the latest trends are online and know how to use them to their advantage.
When you’re making plans to join the modern business race, you should analyze various details that may affect your results. Nowadays, millions of businesses are trying to grow into established and appreciated professional enterprises.
In this video we show how to create a Distribution Group in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Recipients >>…
In this video we show how to create a Contact in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Recipients >> Contact ta…

752 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