26 Nov
2021
26 Nov
'21
2:44 p.m.
On 11/26/21 14:06, Ralph Corderoy via arch-general wrote:
That's a very long-standing rule on SMTP.
Yep Ralph is correct - its a violation of section 2.1.1. of RFC 5322 [a] [a] https://www.rfc-editor.org/rfc/rfc5322#page-7