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Microsoft occasionally uses email to inform users about service features and license information. While it's important to exercise caution with email claiming to be from a trusted source, it's also important to empower yourself with the knowledge and common sense required to determine if a message is legitimate or illegitimate.

The Microsoft 365 team strongly encourages everyone to familiarize themselves with phishing concepts and review available resources on how to protect yourself from phishing. Another great starting point is the UT Austin Information Security Office guide on how to detect a phishing email.

Why is email delivery slow?

Slow delivery of email originating from external sources is typically caused by a large demand on the Mail Filtering Service. If inbound emails are delayed, service administrators will address the issue to ensure prompt delivery of messages. Delays generally do not last longer than an hour.

Mail between internal services take a separate path through the Mail Filtering Service and will be unaffected by inbound delays.

• Email between Microsoft 365 mailboxes will be unaffected by inbound delays.
• UTmail is considered an external service for purposes of email routing and will be affected by inbound delays.