On Sun, Dec 07, 2025 at 03:22:55PM +0000, Linkcheck via Postfix-users wrote:
> Yes, I agree. I have just checked iptables for the third time but found > nothing for google in/out IPs that I know about (actually checking /16)... > > 108.177.16.0/24 > 108.177.17.0/24 > 142.250.220.0/24 > 142.250.221.0/24 > 74.125.224.0/24 > 192.178.223.0/24 > > Any others to look for? Many more: https://developers.google.com/speed/public-dns/faq#locations Or As a JSON file: https://www.gstatic.com/ipranges/publicdns.json > > This suggests that the problem is in the DNS of the recipient domain(s), > which I don't see stated clearly. > > Failed mail to domains (that I know of)... > > linkcheck.co.uk > instepdp.co.uk > schoolhistoryscene.co.uk > shropshireacupuncture.co.uk > > > I don't see any problem with the relevant DNS for the visible domains. I > don't see any reason for a sending server to not even attempt to give you > mail for ssph.org.uk, bristolweb.net, or linkcheck.co.uk. > > Nor me 🙁 > > > If you have a bounce message generated by GMail, it may provide more > useful information. > > Three bounce messages sent to me, all identical except for email address... > > ----- > Delivery incomplete > There was a temporary problem delivering your message to > [email protected]. Gmail will retry for 45 more hours. You'll be notified > if the delivery fails permanently. > > The response was > The recipient server did not accept our requests to connect. For more > information, go to (etc) > [mail.bristolweb.net, 185.35.148.156: timed out] > ----- OK, that does not look like a DNS issue, since the MX host and its IP address were found, but connections timed out. So that's between the Gmail outbound servers and your MX host (packet filtering or network outage along the path). -- Viktor. 🇺🇦 Слава Україні! _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
