omdel
26 days agoTuning in
Issues with email delays and bounces, postmaster not responding
Hi, we have seen a number of senders/IPs be affected with emails being delayed and then bounced due to '421 4.1.1 MXIN503 Hourly ratelimit for your IP exceeded '.
In all cases the email volumes are not that high, and in fact lower than say over the Black Friday and Christmas periods where we saw no rate limiting. I contacted the postmaster@virginmedia.com postmaster address on one instance 10 days ago and have had no reply at all. Is this no longer the correct contact address for the postmaster team?
I now have another case to report for a shared IP pool where max volumes per IP is around 6k mail an hour which really is not high at all, yet as far s we can tell we see this rate limiting happen if there is more than 2k an hour being sent.