[Top] [All Lists]

Re: [ietf-smtp] SMTP Retrying/Sending Strategy on 452 / 4.5.3

2019-02-11 17:02:34
On Mon, 11 Feb 2019 11:09:47 -0500, Hector Santos said:
For example, a Mail List Server (MLS) starting a distribution to 500 
people, connects to a local host IP or LAN IP where the SMTP 
receiver/server running on the same machine or on the same subnet, or 
it could even be a Smart Host were there is an negotiated 
contract/authorization, in these cases, the limits can change or be 

Been there, done that.  We discovered that having our Listserv machine hand off
local deliveries to our main mail hub 2000 at a time and letting it do any
needed envelope bursting generated less load on the hub than handing it 20 mail
items for 100 each.  Made a *big* difference for postings to lists that had 40K
addresses and 2K addresses for the rest of the planet. :)

(And yes, we only did that sort of stuff for high-traffic paths where the 
at both ends were onboard...)

ietf-smtp mailing list