I posted this question on Acronis' forum and haven't had a response.
If someone's familiar with Acronis (Home 2010)--
Previously when using port 25 for our send email Acronis had no problem emailing image completion information.
Now however, after (having to) changing to port 587 the email attempt fails. Shouldn't the port number make no difference to Acronis since it's just passing on (presumably) the information to the email client?