Wow. Thanks for the really helpful replies List. As of this morning I'm not seeing the delays anymore. The IP has been in use as our main SMTP for 13 days from a cold start.
The old, warmed up IP address is long gone - back to the VPS provider. I know now that that was a Rookie mistake - For a long time I was misunderstanding my error messages, and I thought that somehow my old (warmed up) IP address had been blacklisted, but actually I had the Haraka dnsbl plugin enabled, and it was rejecting because my worker dyno on Heroku was blacklisted (I assume for being used to send spam by a previous admin). I have DKIM, SPF, TLS all configured on this instance. I saw delays start out at about 8 hours and reduce to about 40 minutes until they disappeared today. I'm going to publish a blog post about my experiences trying to setup an SMTP using Haraka so hopefully some people can learn from my mistakes. On Thu, 14 Apr 2016 at 07:53 G. Miliotis <corf...@elementality.org> wrote: > On 13/4/2016 22:28, Brandon Long via mailop wrote: > > if you have sufficient volume and your mail authenticates and you keep > > the same authentication when switching IPs, then your reputation > > should transfer. > Does this mean having the same DKIM key or something else? > > --GM > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop >
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