Software

Ask something
Discussion Locked

Exchange - recepients being rejected

0 helpful
4 replies

by mgosselin 1 view

Closed to new repliesThis discussion is closed. It stays readable, but it takes no new replies.

Thanks for taking the time to help me out. I am not too IT savvy, although I was thrust into the position by my even less savvy exec's, so you may need to dumb down your answer.

my users keep getting this error message:

The message could not be sent because one of the recepients was rejected by the server. The rejected email address was '...@...com' .......
Protocol: SMTP, Server Response: '550 5.7.1 Unable to relay for '...@...com', Port: 25, Secure(SSL): no, Server error: 550, Error number: 0x800CCC79

any ideas how i can fix this? frustrating because 90% of emails are getting kicked back.

Thanks again for your help!

Mike Gosselin

4 replies

by mark

You need to have the clients set their software to Authenticate when sending or setup the server to allow their IP addresses to relay.

In Outlook Express you would goto Tools, Accounts, Highlight the account, Properties, Server Tab, at the bottom you will see a check box "My Server requires Authentication". Just check it and the mail will then go thru.

In Exchange 2000, you would use the ?Access? tab of your SMTP Virtual Server and hit the relay button under "Relay Restrictions". Here is a link for more info: http://www.msexchange.org/pages/article.asp?id=54

by mark

I forgot to say that when you get to the Relay tab, you can enter the IP addresses or range of addresses that your clients are using. It will then allow relaying without Authentication for those IPs.

Also, these are 2 ways to fix your problem. One from the client side and one from the server side. If you make the changes in Exchange, then you don't need to do the one in Outlook Express. But keep the solution in mind if you have travelers who try to send mail thru your server while away. Also setup all the notebook PCs that way so they don't have to worry about sending mail while away.

This discussion is closed to new replies.