Yahoo is currently throttling email from the University of Houston. UIT Messaging Team is monitoring the situation and will report when the throttling has been lifted.

SendGrid says that, “Email throttling is controlling the amount of email messages sent to one ISP or remote server at one time. Sometimes ISPs block messages when a high volume is sent by one sender at one time because they might be concerned its spam. “

UH emails to Microsoft are being delayed.

Administrator submitted a request for blocked IP removal yesterday and anticipate resolution soon.

UH emails to Yahoo, Outlook Live and Hotmail are being blocked.

The estimated time to resolution is unknown.