What are you optimizing for? Connection time/overhead? It would seem kind of pointless to keep a connection open for 10 minutes to save 2s of connection time, for example.
Not that we're the best neighbors in this regard, but we don't reuse connections for the vast majority of endpoints, just the highest by volume, and we only keep connections open for potential reuse for 30s. Brandon On Mon, Jul 31, 2017 at 11:24 AM, Ryan Harris via mailop <mailop@mailop.org> wrote: > Hello, > > I was curious if anyone had documentation or knew appropriate times to > keep an SMTP connection open and when to close that connection. Would > connecting via telnet to an ISP and watching when that connection closes, > be the source of truth on how long an SMTP connection should be lasting > with that particular ISP? Or would it be best just to hit up postmasters at > various ISPs? > > Doing some optimization to our mail server and this question came up. > Wondering how best to find how long to keep an SMTP connection time open > per recipient server. ISPs get angry if you just keep a connection open > forever, but curious if there is an optimal time to close. > > Thanks for any help or tips. > > > Ryan > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop > >
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