security Re: Fwd: Request to update dovecot to release v2.3.10.1

["Rebecca N. Palmer" <rebecca_palmer@zoho.com>]

Security fixes in stable are handled by the security archive (higher 
severity) or the stable updates archive (lower severity), not the 
backports archive:
https://www.debian.org/doc/manuals/developers-reference/pkgs.en.html#handling-security-related-bugs

These particular issues have already been reported here:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=960963