I have a situation where a user on my Exchange 2007 box can send email to an email address that has an apostrophe in it.
The receipient then replys and his email gets bounced. I checked my firewall, and for message patterns it has * so that is not the issue. I have just (within the last 5 minutes) whitelisted the email address in my spam filter.
The question is, could it be Exchange that is rejecting the message?
Need help on this one.