Long delay when opening signed emails

[Michal Sojka]

Hi all,

I experience annoyingly long delay, when opening some signed emails in
Emacs. This is likely related to the following lines appearing in my
log when opening the email:

Jan 30 17:07:46 dirmngr[7526]: no CRL available for issuer id A401B7A860C859FEA90E1A7EEE2BAF37C7FB918F
Jan 30 17:08:06 dirmngr[7526]: resolving 'crl3.digicert.com' failed: Server indicated a failure
Jan 30 17:08:06 dirmngr[7526]: can't connect to 'crl3.digicert.com': host not found
Jan 30 17:08:06 dirmngr[7526]: error retrieving 'http://crl3.digicert.com/TERENAeSciencePersonalCA3.crl': Server indicated a failure
Jan 30 17:08:06 dirmngr[7526]: crl_fetch via DP failed: Server indicated a failure
Jan 30 17:08:06 dirmngr[7526]: command 'ISVALID' failed: Server indicated a failure

I don't understand why resolving crl3.digicert.com fails, because it
works from command line.

$ host crl3.digicert.com
crl3.digicert.com is an alias for cs9.wac.phicdn.net.
cs9.wac.phicdn.net has address 93.184.220.29

Any suggestions how to solve the failure or at least to get rid of the
delay?

Thanks
-Michal