On Thu, 11 Mar 2021, Olaf Hopp (SCC) via Exim-users wrote:
> my administration writes one(!) email with more than 3000
> receipients
> in the envelope. (Please, no discussion about the sense of this.
> Period.)
>
> Receiving that mail takes about 2 two hours.
> Delivering that mail is done very quick, as usual.
>
> I started debugging this and I recognized that
> after every "RCPT TO" it took a sucessive increasing time
> until the "250 Accepted" was answered.
> At the beginning this was a 10th of a second.
> After 1000 recipients there was a delay of ~one second
> after the 2000th recipients this delay increased smoothly
> to 2 secends ofter each rcpt-to
> Any ideas what's happening here ?
The increasing delays remind me of the delays for failed logins.
Is there some sort of authentication, or similar pam or SMB access,
to check the existence of each recipient ?
--
Andrew C. Aitchison Kendal, UK
andrew@???
