Plone Mail Settings - Suport for multiple Authentication Schemata

[loechel]

PLIP (Plone Improvement Proposal)

The Plone Mail Settings in Plone Control Panel does only support password based Authentication for SMTP Servers currently. We should support all common authentication schematas, like NTLM and OAuth2.

From Wikipedia the following SMTP Auth mechnisem existed or exsits:

• PLAIN (Uses Base64 encoding)
• LOGIN (Uses Base64 encoding) --> obsoleted in favor of PLAIN
• GSSAPI (Generic Security Services Application Program Interface)
• DIGEST-MD5 (Digest access authentication)
• MD5
• CRAM-MD5
• OAUTH10A (OAuth 1.0a HMAC-SHA1 tokens as defined in RFC 5849)
• OAUTHBEARER (OAuth 2.0 bearer tokens as defined in RFC 6750)
• XOAUTH2

Responsible Persons

Proposer: Alexander Loechel (@loechel)

Seconder:

Abstract

Motivation

Some Mail providers does not accept plain username + password authentications. As Plone needs to work in all environments, that should be direct configurable in the Plone Mail Settings Control Panel. Corresponding implementation in zope.sendmail (zopefoundation/zope.sendmail#59) necesary.

Assumptions

Proposal & Implementation

Deliverables

Backend implememtation on zope.sendmail, and corresponding Frontends in volto and ClassicUI

Risks

There is no risk of breaking anthing, but there is as a huge risk that Plone won't work for intitutions and users that rely on modern SMTP Authentication Mail Servers.

Participants

[loechel]

At least some UI Developers are needed for that