[sylpheed:37048] SSL certificates need to be updated again for v 3.7 on Windows

The SSL certificates were last updated Jun 5, 2020. They now need to be updated again.

I recently started getting SSL errors when communicating with  mail servers via SSL.

Specifically, I'm having trouble with lynx.mythic-beasts.com, smtp-auth.mythic-beasts.com, and dynamicwind.com.

These certificates are signed by
Let's Encrypt
which is signed by
Internet Security Research Group (expires 2035)
which is signed by
Identrust (expired 2021)

The Identrust certificate just expired, but for some reason Sylpheed does not recognize the validity of the ISRG cert, or else it sees the expired one and refuses to verify even though it  can form a working chain.

To make matters worse, there is no setting that allows me to disable this checking or accept the certificate, so I have to click "accept" dozens of times every time, making the program essentially unusable for me.

Hoping I can get some help with this.

Thank you!

Jeremy