Mail crypt plugin with HSM

Hello Dovecot developers,

I'm using a mail-crypt plugin to perform encryption at rest using per user keys encrypted with their password. Great plugin and I really appreciate it's continuous development and improvement.

I have a question regarding mail-crypt keys being stored in HSM. Is it possible? I'm almost sure I've seen some discussion about usage of PKCS#11 in mail-crypt but can't find it in the mailing list.

Please advise. Thanks!

• Dima