Thanks, so despite the bounce saying it's a problem with the recipient, it may very well be a problem with our sending IP ?
Just trying to make sense of what the error really means. Scott On Thursday, 16/01/2025 at 04:27 Peter N. M. Hansteen wrote: On Thu, Jan 16, 2025 at 03:46:12AM -0500, Scott Q. via mailop wrote: > A user is trying to e-mail someone at setunari.com but we get > this weird bounce: > > 85.13.157.168 does not like recipient. > Remote host said: 550 5.7.1 : Recipient address rejected: temporarily > blocked because of previous errors - retrying too fast. penalty: 30 > seconds x 0 retries. > Giving up on 85.13.157.168. > > I was thinking it's a problem with the recipient but it appears to > work from other locations (?). is NAT involved at all? If the same client manages to send from a different location, I would assume that their source IP address changed. One likely or at least possible reason for the message is that in the original location, they were sharing the routable address with something noisy enough that the rate limiting was triggered. Then again it could be that they were themselves the noisy one but their activity at the alternative location had not yet the "classified as too much" level. -- Peter N. M. Hansteen, member of the first RFC 1149 implementation team https://bsdly.blogspot.com/ https://www.bsdly.net/ https://www.nuug.no/ "Remember to set the evil bit on all malicious network traffic" delilah spamd[29949]: 85.152.224.147: disconnected after 42673 seconds.
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