On 5/15/2019 12:29 PM, Peter Fraser wrote:
I believe what happened is the testing software they used tried to
send an email out using an empty domain and Postfix accepted it. I
did it manually to verify from the commandline
MAIL FROM: <>
RCPT TO: an email address
DATA
Blablabla
.
Postfix queued up this email and sent it out.
Regards
SI
Insufficient data.
If the recipient is one of your users, this is required operation.
https://tools.ietf.org/html/rfc5321
If the recipient is some random external user, we need more
information. Note that testing must be done from an IP *not* listed
in $mynetworks.
http://www.postfix.org/DEBUG_README.html#mail
-- Noel Jones
