This is the mail archive of the
mailing list for the GCC project.
Re: OT: Sobig
Kelley Cook <email@example.com> writes:
> It then connects to the default SMTP server
Small nitpick: Sobig comes with its own MTA which sends a
syntactically invalid HELO argument (it's _syntactically_ invalid, so
may reject the message without violating a requirement in RFC 2821
8-). If you refuse HELO commands whose argument does not contain a
".", you can evade most Sobig traffic.
Of course, you may have to disable the "." for your internal