add README.rst to manifest
Merge remote-tracking branch 'kali/add-readme-to-manifest' into develop
Make the pkey a property

so we can allow multiple accounts in the imap fetcher.
add missing zope.interface dep
Merge remote-tracking branch 'kalikaneko/add-zope-interface' into develop
Merge remote-tracking branch 'kali/bug/4394_update_pkey' into develop
Reject senders if they aren't the logged in user
Merge remote-tracking branch 'chiiph/bug/reject_bad_senders' into develop
Do not encrypt already encrypted mails in SMTP relay.
Cleanup code and fix tests.
Change SMTP "relay" to "gateway".
Merge remote-tracking branch 'drebs/feature/4324_prevent-double-encryption-when-relaying-2' into develop
remove print
add a fqdn as the local domain, always
refactor callbacks so we properly catch remote errors
add changes
use deferToThread in the sendMail. Closes: #3937
Merge remote-tracking branch 'kali/bug/fix-fqdn' into develop
Correcly handle message headers when gatewaying. Closes #4322 and #4447.
Merge remote-tracking branch 'drebs/feature/4447_fix-headers-when-gatewaying-messages' into develop