Undocumented from_ parameter in _mboxMMDF methods

[sebbASF]

Some mboxMMDF methods have an extra from parameter which is currently undocumented.

Linked PRs

• gh-121529: Document from_ parameter in _mboxMMDF methods #121530
• [3.12] gh-121529: Document from_ parameter in _mboxMMDF public methods (GH-121530) #131622
• [3.13] gh-121529: Document from_ parameter in _mboxMMDF public methods (GH-121530) #131623

[picnixz]

Thank you for the report and the fix!