18 May
2025
18 May
'25
11:28 p.m.
On 5/18/25 4:09 PM, Randy Bush via NANOG wrote:
I think that most contemporary MTAs use some form of (weak) authenticated identity. The most common that I see is reverse DNS with forward DNS confirmation. A less common form of (client) authentication is username & password. DANE
DKIM, actually. And it's not weak, modulo use of DNS with its dodgy DNSSec deployment. Mike