There is a new pull request by Anachron against master on the mblaze repository

https://github.com/Anachron/mblaze master
https://github.com/leahneukirchen/mblaze/pull/226

mcom: Add sendhook
This allows to execute commands after a mail has been sent.
Requires a modification of $MBLAZE/profile (new header: `sendhook`).

For now commands with spaces are not allowed, as this would complicate the code.

Closes #204

A patch file from https://github.com/leahneukirchen/mblaze/pull/226.patch is attached