navse@mailbox.org writes:

> Hello,
>
> I have been using Notmuch with Emacs for a couple of days and it has
> been working great, except for when I open mails from a certain sender
> with S/MIME signed messages, Emacs will freeze up for about 4 minutes.
> Opening the expandable signature inside of the Email repeats the lag.
> Lag causing message is attached with confidential lines deleted.
>
> Help is much appreciated and thank you for providing great FOSS.
> - N

S/MIME has this feature (design flaw?) where it wants to phone home to
see if the certificate has been revoked.  This can result in the kinds
of delays you describe. One option is to add "disable-crl-checks" to
~/.gnupg/dirmngr.conf. This will have the side effect that you will not
be notified about certificate revocations (unless maybe you re-fetch the
cert?).
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