[MM3-users] Mailman rewrite the Cc header incorrectly

I just notice that if I send an email to a list with a Cc header broken into multiple lines and the pair of double quotes are put in different lines, the email addresses afterwards will be wrongly rewritten.

For example,

CC: "ABC DEF (XYZ)" <name@example.com>

It will become the following after going through the mailing list:

CC: XYZ <"ABC DEF"@mail.server.name>

It seems that Outlook often split the To/Cc header into multiple lines and they often add double quotes to the full name of the users. Is the rewriting of Cc header handled by Mailman's code or another Python class? Thanks.

Regards, Alan So