By submitting your email address, you agree to receive emails regarding relevant topic offers from TechTarget and its partners. You can withdraw your consent at any time. Contact TechTarget at 275 Grove Street, Newton, MA.
My Outlook profile has two accounts:
email@example.com (default profile)
- I create a new message to firstname.lastname@example.org.
- I receive a message reply by the administrator because Exchange does not know 'yahoo.com.'
Why is this happening? What could be going on?
For example, I found that a reverse lookup of one of the yahoo.com mail server's IP addresses returned a domain of servername.mail.yahoo.com as opposed to just servername.yahoo.com. This is close but maybe no cigar for your filters.
In the case of some other ISPs that are being blocked, it is not even close at all. The bad news is that, if you set up an exception for the entire yahoo.com domain, a lot of spam will come through unchecked. If you leave it blocked, you will continue to have this problem.
I think the solution probably lies with yahoo.com and other ISPs.
Do you have comments on this Ask the Expert Q&A?Let us know.
Dig Deeper on Spam and virus protection
Related Q&A from Richard Luckett
Is there a way to gain access to multiple users' calendars from the Exchange Management Console in Exchange 2010?continue reading
When moving mailboxes from Exchange 2010 to 2013 on premises, I keep receiving error messages. What could be causing this problem and how do I fix it?continue reading
I have limited drive space on my Exchange Server but need to restore large mailboxes. Can I prevent mailbox restores from a recovery database by ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.