On Wed, Oct 09, 2024 at 08:43:29AM +0100, Stephen Borrill wrote: > On Tue, 8 Oct 2024, Jay F. Shachter wrote: > [snip] > > Unrelated to the above -- I sent this message hours ago to the mailing > > list, and the SMTP server at mail.netbsd.org sent me back a 450 error > > because it was greylisting me, which I only noticed a few minutes ago. > > I think it is moronic to greylist people who are on the netbsd-users > > mailing list. Is there any empirical reason why this is being done? > > Was your email plain text or was it multipart/alternative with HTML? The > latter would be greylisted.
Yes, it probably was both. The multipart/alternative would be sent to the mailing list owner for manual approval and will only show up on the list after that (which could take anything from a few minutes to a few days). The greylisting is happening to all mails that come in from unknown IP addresses and it can't be avoided for list subscribers - as the email address may be a lie. Greylisting is harmless and only causes a very small delay in mail delivery. It needs no manual intervention. Martin
