UIT Security Alert: UH Email - University of Houston
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Informational

UIT Alert: Informational

Current Status

IssueUpdate # 6 - UH emails to Comcast being blocked.

Affected Services

  • Email (Exchange)

Event Updates

IssueYahoo addressed email is being delayed.
October 16, 2017 , 5:00 PM

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. “

IssueUpdate - UH emails to Microsoft are being delayed.
October 19, 2017 , 9:31 AM

UH emails to Microsoft are being delayed.

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

IssueUpdate #2 - UH emails to Yahoo, Outlook Live and Hotmail are being blocked.
October 24, 2017 , 3:12 PM

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

The estimated time to resolution is unknown.

IssueUpdate #3 - UH emails to Outlook.com, Live and Hotmail are being blocked.
October 24, 2017 , 4:25 PM

UH emails to Outlook.com, Live and Hotmail are being blocked. SME submitted a request to Microsoft to release the blocks.

IssueUpdate # 4 - There are no ISPs currently blocking.
October 30, 2017 , 11:18 AM

There are no ISPs currently blocking.

AOL, Outlook, Live and Hotmail were resolved last Friday.

Yahoo is still throttling.

IssueUpdate # 5 - ISP Throttle/Blocking Message
November 21, 2017 , 5:41 PM

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.

ResolvedMessage throttling is not occurring at this time.
December 6, 2017 , 1:30 PM
Yahoo is not currently throttling university email.
IssueUpdate # 6 - UH emails to Comcast being blocked.
December 8, 2017 , 8:44 AM

UH emails to Comcast are being blocked.

SME submitted a request to Comcast to release the block.