On 9/25/23 12:42, Michael Kjörling wrote:
The following address(es) failed:
rickm@localhost
SMTP error: 550 header syntax
So something running on your local system almost certainly tried to
send mail to either "rickm" or "rickm@localhost", and that triggered
queuing the non-delivery notice which you're seeing evidence of in
your outgoing mail logs.
Do you have something like fetchmail set up in multidrop mode, any
forwarding procmail rules, spam filtering, or anything similar,
especially ones that would be triggered by something being sent to...
Not multi-drop mode, no forwarding procmail rules: only delivery to mail
folders (and a few to /dev/null).
I did find that I had Thunderbird Return Receipts turned on for some
cases. I thought it was set to "always ask me". I've used Thunderbird
forever, and it's asked me maybe once. However, I see now something that
I missed understanding:
If I'm not in the To or Cc of the message: Ask me
These spam emails would have me in the To field. Could this be the
origin of these reply attempts?
I've now set it to "Never", but based on your comments and Andy's, this
doesn't seem to be the source of the messages?
Rick
