https://gitlab.synchro.net/main/sbbs/-/commit/5564eb67e84e55e8a6dcbb0e
Modified Files:
src/sbbs3/mailsrvr.c
Log Message:
MIME-encode words that contain non-ASCII values in text header fields

(e.g. to, from, subject) ... when transmitting to other hosts (e.g. POP3 clients or other SMTP hosts).

For messages that contain CP437 or UTF-8 chars in these fields and were *not* imported into the BBS via SMTP or POP3, these header fields would be transmitted to other hosts with the raw CP437 or UTF-8 chars, thus violating POP3 and SMTP protocols and likely resulting in garbage displayed in message readers.

The fix is to encode (using MIME "encoded words", per RFC 2407) where necessary.

Since moderm mail clients (e.g. Thunderbird) don't see to support CP437
charset in MIME encoded header fields, always translate to UTF-8 first.

We probably should be translating message body text to UTF-8 as well, for maximum compatibilty with modern mail readers, but this commit doesn't address body text issues with CP437-encoded content. That'll come later.

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https://gitlab.synchro.net/main/sbbs/-/commit/42e9eb8bf7c0d7f338b46d1c
Modified Files:
src/sbbs3/mailsrvr.c
Log Message:
Allow email.can to contain email sender/recipient *names* as well as addresses

Allow filtering/blocking email based on the name portion of email header fields.

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https://gitlab.synchro.net/main/sbbs/-/commit/e6d8053f3457d19d0e456ddb
Modified Files:
src/sbbs3/mailsrvr.c
Log Message:
Report bigger "size of message" in POP3 LIST response

For messages that have no body, we'd report 0. But RFC 1939 says this value
is supposed to be "the exact size of the message in octets" <sigh>. This
would include header fields, so while we can't know the exact RFC822 size, adding the msg's hdr.length to these values gives size > 0 for messages
with no body text and this enables the Apple iPhone Mail app to download
the message (fixing issue #822).

Part two of this fix is to provide a blank line of message text when there
is none. This changes the message displayed in the iPhone Mail app from:

"This message cannot be displayed because of the way it is formatted.
Ask the sender to send it again using a different format or email program.

text/plain"

to (the much nicer):
"This message has no content".

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https://gitlab.synchro.net/main/sbbs/-/commit/bb3485a9c4e2c36a07aaf512
Modified Files:
src/sbbs3/mailsrvr.c
Log Message:
Include the size of the message headers in the POP3 STAT response too

I suppose if we only had messages with no body text, this value could be 0
(not accounting for any headers) and thus throw a client off.

So consider this as part of the fix for issue #822.

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https://gitlab.synchro.net/main/sbbs/-/commit/d8cfb5796705016a316aa670
Modified Files:
src/sbbs3/mailsrvr.c
Log Message:
Add/use errprintf() to reduce severity of repeated error messages

Part of solution for issue #619 (for the mail server)

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