Hey Johnny, I recently installed DECmail-11 on RSTS the other evening, and I'm noticing some undesirable behavior with the mim.stupi.net email gateway going out from inside HECnet.

Firstly, it's worth mentioning that gmail won't accept a recipient address with colons in it, unless you put double quotes around it.
For example:
MARDUK::PHIBER@mim.stupi.net
...won't be accepted as a recipient, and the message is immediately red-flagged in gmail.

However, if you do the following:
"MARDUK::PHIBER"@mim.stupi.net
...gmail accepts and delivers it, MIM relays it correctly, and I receive the email in RSTS. Nice.

Unfortunately, the reverse is failing. If I respond or send mail out from DECmail, mim.stupi.net's sender address rules reject the message:

This is Postmaster <MIM::POSTMASTER> at MIM::.
I'm sorry, but I could not deliver your mail.
An error occured while trying to send it, and I cannot recover.

Orignal recipient was "PHIBER@PHIBER.COM"
Actual error is: Fatal address error.

Additional information:
5.1.7 The sender address <MARDUK::PHIBER@mim.stupi.net> is not a valid
5.1.7 RFC-5321 address. h19-20020a05651c125300b0025e725ef592si33185ljh.300 - gsm
tp

Please let us know if you can correct the sender address restrictions on mim. I tried with quotes, but that didn't help either. :)

Thanks,
Mark