What are the reasons that emails for a request for reference might be ignored or delayed in response, a long time after the deadline by an intimate academic advisor?

  • 1
    Your email arrived in the spam box. You mis-typed their email address so they never got it. etcetera...
    – Solar Mike
    Aug 31, 2019 at 6:16
  • i don't think close associates' emails will arrive in spam folders, will they
    – feynman
    Aug 31, 2019 at 14:31
  • 4
    @feynman Sometimes yes. Or they may not even arrive there if a mis-configured malware blocker decides to trash your email entirely. Email has no delivery guarantees.
    – jakebeal
    Aug 31, 2019 at 14:33
  • @jakebeal This failure of arriving at their mail box never happened when advisor and advisee actually worked together. Failing to receive emails after both sides stop meeting each other is hard to believe
    – feynman
    Aug 31, 2019 at 14:41
  • 4
    It is easy for the IT dept to "adjust" email spam filters which causes issues... And yes had it happen to me, Thanks IT...
    – Solar Mike
    Aug 31, 2019 at 14:46

1 Answer 1


Professors and other researchers are typically busy people receiving a constant flood of emails in their inbox, a great many of which are time-sensitive and important. Yours is only one of many.

The most likely reason for somebody's failure to respond promptly to an email, then, are just the typical ones for any busy person: getting lost in their inbox, technical failures (overactive spam filter, address mixups, dodgy forwarding systems), and falling through the cracks in an overcrowded schedule.

It might also be, however, that the professor is wasn't actually as strong a reference as you thought and just didn't feel comfortable saying no. Did you ever have a non-email conversation about the references? And if they aren't responding to email, pick up the phone and call!

Finally, since this is not an uncommon occurrence, I also recommend that for important but asynchronous interactions like references, if possible one should give 1-2 more than required.

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