I recently installed SBS 2011 without any issues. Everything went very smooth, which i was a little surprised. well after afew hours of testing, we noticed that emails coming from gmail or yahoo were never delivered to the user's mailboxes. I was able to get them using the pop3 connector, since i saw them on the my isp's webmail, and then after retreiving emails , they were gone, but they were never deliverd to the users mailbox. I configured the smarthost thinking that it was that but I still did not get the emails.
Weird thing is that if I send an email from exchange to either yahoo or gmail account, and I reply, the email DOES get delivered. But if the email is initiated from gmail or yahoo, it nerver gets delivered. I do not have problems receiving from any other host, email hotmail.
I am able to send to all email addresses without any problems.
Does SBS 2011 have any features to block emails coming from certain domains?
Any help is greatly appreciated.