Am 16.07.2025 um 12:04:16 Uhr schrieb Frank Bures: > If smtp.gmail.com resolves to an IPv6 address, relaying works. If it > resolves into IPv4 address, the above error ensues. > > I checked my firewall, there is nothing relevant to the > smtp.gmail.com IPv4 addresses.
Can you contact the server with telnet/ncat on port 25 (or another port you specified in mailertable)? Maybe your ISP blocks that traffic (and doesn't reject with ICMP). -- Gruß Marco Send unsolicited bulk mail to 1752660256mu...@cartoonies.org
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