Our recent migration of MX records for the @utoronto.ca and @mail.utoronto.ca domains changed the way that anti-spam works for individuals with addresses in those domains; incoming mail is now scanned by Exchange Online Protection (EOP).
There have been sporadic reports of EOP generating spam false positives. This article provides some solutions:
As a result of e-mail maintenance, there was a brief outage for a small number of grandfathered UTORmail mail clients forwarding to UTmail+. An interim fix has been implemented and a permanent fix is being investigated.
Please forward any non-delivery errors to firstname.lastname@example.org.
The Help Desk has received reports of emails that appear to be valid because they contain content from real messages sent by a trusted source. The emails appear to be from someone within the original email’s address list and contain a subject beginning with “Re: RE:”.
Currently these phishing messages only contain malicious links. Be wary of any emails asking you to click on a link, even if they appear to come from a trusted source. If you are unsure, follow up with the person the email seems to have come from.