Re: 3 bugs in Rmail

[Glenn Morris]

BTW, message.el's use of symbols and assq for header-name tests all
over the place is also bad because even if you intern string headers,
they have to have the same case in order to match, when mail headers
are case-insensitive. sendmail-user-agent-compose on other hand uses
assoc-string with case-folding and member-ignore-case, so it does not
have such issues.