[Mimedefang] sender: <>

[Kevin A. McGrail]

Sender <> is indicative of a bounce message so what you are saying that
someone is forging your domain, sounds correct.

Regards,
KAM


> I'm seeing lots of probes for (usually non-existent) usernames
> with "MAIL FROM: <>".  At first I thought maybe I should just
> drop those... but then reading the list I saw that apparently
> md_check_against_smpt_server does that.  So maybe all these
> probes I'm seeing are from mimedefang sites that are getting
> spammed by someone who is forging my domain?
>
>  From a standards perspective, it sender '<>' legit?