Mark Dadgar writes:
So since I upgraded to Mailman3 recently, I’m getting reports of mangled digests even with with plaintext digests turned on. Running 3.2.1 from the ubuntu packages.
"Plaintext digest" refers to the encapsulation format that provides boundaries for individual messages, not to the content of the individual messages. If people are sending MIME-formatted mail, that's what will be included in the digest. If you don't want MIME-formatted mail, you need to set "collapse alternatives" to true, and probably "convert html to plain text" to true. You'll also need to set a rather draconian list of "MIME types to include" in "Content Filtering" (basically
multipart text
is what it needs to be). This will cause all attachments to be deleted, and reduce text parts to text/plain as much as possible.
This list was imported from mailman 2.1.x.
Example below.
If it's not the fact that the included message is MIME-formatted, what is alleged to be mangled? Looks standard-conforming to me.