On Thu, Nov 28, 2024 at 09:06:57PM +0100, Alexander Dallou wrote: > Hi, > > why is this list now trying to send with a non-resolvable domain > "@cyrus.bounce.topicbox.com"? It is causing a reject like > > NOQUEUE: reject: RCPT from tb-ob1.topicbox.com[64.147.108.173]: 450 4.1.8 <bounce.mM45931bd0f6a5bab2891e5f42.r34c20dac-0eef-11eb-bf52-c982292d11b0@xxxxxxxxxxxxxxxxxxxxxxxxx>: > Sender address rejected: Domain not found; from=<bounce.mM45931bd0f6a5bab2891e5f42.r34c20dac-0eef-11eb-bf52-c982292d11b0@xxxxxxxxxxxxxxxxxxxxxxxxx> > to=<ad+lists@xxxxxxxxx> proto=ESMTP helo=<tb-ob1.topicbox.com> > > $ host cyrus.topicbox.com > cyrus.topicbox.com has address 64.147.108.168 > cyrus.topicbox.com mail is handled by 10 mx1.topicbox.com. > cyrus.topicbox.com mail is handled by 10 mx0.topicbox.com. > $ host cyrus.bounce.topicbox.com > <empty> > > Guess that's by mistake, right? The sender domain hasn't changed but for a few days cyrus.bounce.topicbox.com no longer resolves. More/all topicbox.com mailing lists (e.g: illumos, zfsonlinux, etc.) are affected. I have already reported this to Fastmail. Three months ago I also had to whitelist a topicbox.com mailserver because of a similar issue. ------------------------------------------ Cyrus: Info Permalink: https://cyrus.topicbox.com/groups/info/Ta9c8473469c89549-Ma7e9318492e30a38eaf70bf5 Delivery options: https://cyrus.topicbox.com/groups/info/subscription
