>>> Sendmail, relay checks.
>> Ugh, good point.  And - at least in the code I just looked at, which
>> admittedly is probably not the most recent - sendmail doesn't
>> disable any source-route option that's present.
> what kind of source routing are you talking about here?

LSRR or SSRR options in the packet that initiates the TCP connection.

> if it's ip source routing, then sendmail will detect it and stuff a
> warning into the headers.

Where is the code for this?  I must have missed it (or perhaps it just
isn't there in the version I looked at) - though admittedly I was
looking for code to _kill_ LSRR/SSRR options, not to merely _notice_
them.

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