The very rough thought is that it takes about four weeks to warm up a new IP address. In your case, I think you'd want to split the traffic 50/50 between the old IP address and new one and then it'd be a case of waiting to see how long before Gmail figured out that the mail coming from the new IP address is good stuff and thus shouldn't be subject to delays.
I'd also make sure that the mail passes SPF and is signed with DKIM. There's a chance that they'll identify the mail as good faster if it comes in the door with stable, accurate authentication. I don't know for sure if enabling TLS would make things better, but it can't hurt, either. The keys here are: 1. This is annoying, but 2. It is not forever. Keep your head down and send good mail and it will get better. If you seed your own Gmail address in sends hourly/every 4 hours/12 hours or daily, then you can pretty easily download that mail with IMAP or POP3 using something like Fetchmail and then pull the date/time fields out of the received headers to give you insight into where the delays are at any given time. I've done this in the past to troubleshoot internal hop delays at Gmail (a different issue). Hope that helps. Cheers, Al Iverson -- Al Iverson www.aliverson.com (312)725-0130 On Wed, Apr 13, 2016 at 5:39 AM, Robert Guthrie <rguth...@gmail.com> wrote: > Hello list, > > I run a group decision making app. We send about 40,000 transactional emails > a day, with very good open rates. > > I recently setup a new SMTP on a new IP address, emails to Google Apps > accounts take a few hours to arrive do to throttling on Google's end. I wish > I'd reused the old IP address, because those emails always arrived > immediately. > > After about a week I'm still seeing 1 hour delays on things like password > reset emails. How long does this warm up process typically take? Is there > anything I can do to reduce the delay time? > > _______________________________________________ > 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
