Re: Emacs client stuck when opening S/MIME signed emails

Subject: Re: Emacs client stuck when opening S/MIME signed emails

Date: Tue, 28 Oct 2025 06:43:16 -0300

To: Xiyue Deng, notmuch@notmuchmail.org

Cc:

From: David Bremner


Xiyue Deng <manphiz@gmail.com> writes:

> Hi,
>
> The Emacs client of notmuch gets stuck when opening a S/MIME signed
> email.  The client will freeze indefinitely.  `C-g' can unstuck but
> shows an error of "[some mark read tag changes may have failed]".  I
> suppose S/MIME signatures are not really supported.  Setting
> `notmuch-crypto-process-mime' to nil can workaround this, but also
> disables PGP signature check.  Is there any option to just disable
> S/MIME signatures processing?
>

The usual problem is CRL revokation checks. You can disable these in 
~/.gnupgu/gpgsm.conf with

      disable-crl-checks

There is obviously a security tradeoff, but I guess it's better than
disabling gpgsm completely
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