On 4/13/22 3:40 PM, Grant Taylor wrote:
I don't know what name Thunderbird uses in it's HELO / EHLO
command(s). Though it shouldn't matter much which name is used.
The important thing should be that the SMTP client, be it Thunderbird
or nullmailer or something else, should authenticate to the outbound
relay / MSA. The MSA should then use that authentication as a control
for what is and is not allowed to be relayed.
Okay, that's a good tip. From tcpdump on my work machine (nullmailer
runs on my home machine, though), I have:
EHLO.[10.0
0x0040: 2e32 2e31 355d 0d0a .2.15]..
so the argument to EHLO supplied by /thunderbird/ is my ip address. So,
the hypothesis is, if I can coerce nullmailer to use that, it should work?
