Re: [EXTERNAL] Nessus says I have an open relay

2021-11-09 Thread KSB
On 2021.11.09. 18:59, Jaroslaw Rafa wrote: Dnia 9.11.2021 o godz. 10:13:08 Bill Cole pisze: NOTHING should be allowing SMTP relay based on IP addresses in 2021, even inside RFC1918 networks. Anything sending mail that can't do proper authentication at initial submission is unfit for sending mai

Re: [EXTERNAL] Nessus says I have an open relay

2021-11-09 Thread Jaroslaw Rafa
Dnia 9.11.2021 o godz. 10:13:08 Bill Cole pisze: > NOTHING should be allowing SMTP relay based on IP > addresses in 2021, even inside RFC1918 networks. Anything sending > mail that can't do proper authentication at initial submission is > unfit for sending mail at all. Whatever legitimate mail act

Re: [EXTERNAL] Nessus says I have an open relay

2021-11-09 Thread Bill Cole
On 2021-11-09 at 09:23:13 UTC-0500 (Tue, 9 Nov 2021 14:23:13 +) White, Daniel E. (GSFC-770.0)[NICS] is rumored to have said: Clarifying: The relay did not reject the message. The MDA did the rejection. Is this correct ? Yes. LOCAL_MDA replied with a 4xx code, indicating to the relay t