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Stan,

I can understand moderating to eliminate spoofed (I don't know what
that means)

Forging the From address of an email.


Ten or more years ago this was a serious problem for Yahoo Groups - spambots, scammers, and malcontents were sending messages using the From address of group members, and those messages would be accepted and posted if not caught by a moderator.

This has become a much less common threat as email systems in general, and Yahoo Groups and Groups.io in specific, have become better at rejecting spoofed messages before they reach the group or its pending queue. I haven't tried it lately, and I don't know that it isn't still possible.

or compromised mail accounts, ...

This is the more common method for fraud these days. Email accounts have traditionally been as vulnerable as the user's discretion in choosing a "strong" password. Stolen or guessed email account credentials are a hot-selling item in the nether regions of the internet.


Email services are tightening up on this, at least the name-brand ones. But in a group with world-wide reach one may have members with services of various quality.

Shal


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