Some Google services use one day, some use three days. There are some outliers on receiving mail, ie particular users can be hospitalized or temporarily disabled and then retries will go longer.
I always wanted to lower it, the messages that take longer than a day are in the noise, and a lot of time that's because a mailbox is so busy that it's on the edge of being able to actually handle the volume, and the problem is more one of flow control (twice in two threads, wow) One of the main reasons I don't think we should use such long retries is that it violates user expectations. Users often treat email as nearly instantaneous, because it normally is... so taking hours or days of actually failing without any quick indication to the user violates that expectation. As much as I'm annoyed in instant messaging apps when they give up in seconds and I have to manually retry, at least they aren't fooling me into thinking the other party has the message. I periodically proposed an "outbox" idea where messages would be very visible with attempt and failure information until the message was accepted by the remote server, but it never made the cut. Brandon On Sun, Feb 2, 2020 at 11:20 AM Tony Patti via mailop <mailop@mailop.org> wrote: > In addition to "long weekends", I would add "natural disasters". > > As I recall the 5-day-rule came in handy during Hurricane Sandy as well... > > Tony Patti > > -----Original Message----- > From: mailop <mailop-boun...@mailop.org> On Behalf Of Michael Orlitzky > via mailop > Sent: Sunday, February 2, 2020 1:16 PM > To: mailop@mailop.org > Subject: Re: [mailop] How long to retry? > > On 2/2/20 12:52 PM, Chris Adams via mailop wrote: > > Just an idle Sunday question... how long do you have your mail > > server(s) configured to queue and retry messages before bouncing them > > back to the sender? > > > > I know back in the day, 5 days was the norm, to handle servers that > > were only sometimes connected, outages, etc. > > The five-days number is recommended by the RFCs. I always assumed that > number was to account for "long weekends." If your server crashes on > somebody else's property on Friday, and if Monday is a holiday, you can > still get mail that is retried for 5 days. > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop > > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop >
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