Cannot verify server identify error message in MacOS/iphone email app

microvax

• September 30, 2021 10:13

Hello, Today several users started to receive this error message on their MacOS and Iphone email applications and I have the impression that it has to do with an expiring SSL certificate, so I started to check their expiration dates and they seem to be renewed today. However their email clients are still showing the error message, so I was wondering if there is a way to force their software to update the validation information

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  smurf

  • September 30, 2021 15:16

  This has just started happening for us on one cPanel server in the last hour. Seems a bigger issue. We've opened a ticket with cPanel support.

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  coursevector

  • September 30, 2021 15:41

  This is affecting my servers as well, Thunderbird, Outlooks, mobile device mail apps all seem affected. It's as if the exim/dovecot SNI stopped working. I guess I'll open a support ticket too.

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  coursevector

  • September 30, 2021 16:10

  This appears to be related to Let's Encrypt expiration of their root certificate. cPanel have any advice to resolve this error?

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  microvax

  • September 30, 2021 17:31

  Also noticed that some Outlook clients started to report this error message "Your server does not support the connection encryption type you have specified"

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  quietFinn

  • September 30, 2021 17:43

  We had the same problem and here is what I did:

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  cPRex Jurassic Moderator

  • September 30, 2021 18:03

  We have many more details at and I'll be posting there as I get more information.

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