View Full Version : Mac Mail - cannot send message using the server

01-12-2017, 05:44 PM
I manage a network of mostly Windows machines running Outlook. The Graphics department uses all Macs and Mac Mail app for email. Email has been working fine, but this past week, ALL Mac Mail users have been experiencing random errors where email will not send, giving the pop up "cannot send message using the server". Please see attached image. The Windows / Outlook users are fine with no reported issues. Anyone have any suggestions?