Am 20.10.22 um 23:07 schrieb Lena--- via mailop:
T-Online clearly states in their terms and conditions that they will block servers who perform sender verfication towards them.
Well, that's why you separate your MXes from your Sending servers; the MX can do anything from it's IP, any fingering to the remote MX as it likes — it will never ever rely on being able to relay a message to remote's MXes :) OTOH, MX refusal due to frivolous behaviour hasn't been implemented yet ;-) Yes, I'm a big fan of sender-address-verification and other "abusive" techniques. Be my guest: My domain, my rules.
Then a different check:
I don't speak smail3^Hexim anymore, but I assume it's somewhat similar to telnet $mx 25 if 2xx send quit if 5xx set fuckem=1 && send quit || ignore errors if $fuckem<1 die in_peace else wreck havoc ? _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
