Yesterday, our users started to receive Delivery Delay notices for the outgoing email that they had sent. Today, the problem is continuing. I started to look into it and noticed within the Exchange System Manager the queue has about 155 items in it and the number is not decreasing. When I click on one of the items, it states at the bottom of the System Manager that "The remote server did not respond to a connection attempt."
I found a suggestion online to stop the SMTP server, go into the Exchsrvr\Mailroot\vsi 1\Queue directory, cut / paste the files into another location and then start the SMTP server up again. Then try sending an email again to see if it goes through. I tried this but even after cutting / pasting the files from the Queue folder, the Exchange System Manager still shows 155 items in the queue for processing.
I am at a loss on what to do here to get outgoing emails working again. Any help is greatly appreciated!