Am Sonntag, 31. August 2025, 14:44:48 UTC+00:00:01 schrieb Antonin Verrier via mailop: > I have a customer that has their email hosted by Gandi (French domain > registrar/hosting company) and can't send out emails because Gandi are > using a subset of Spamhaus' RBL (XBL/SBL it seems) to filter access to > mail submission (SMTPSA on port 465). If (!) your customers is legitimate customer of Gandi which sends authenticated email per their servers OR even their access network i would see this as a misconfiguration by Gandi.
BLs typically are used to help valuing spam probability for incoming - non authenticated - email (even then: hard blocking a sender because the senders IP is in a single BL leads to at least some false positives. Such service would be not really suitable to run some reliable email server / services on it). Running a email server is "easy", but running a reliable email service requires much more then that. I would let do that skilled specialists if you rely on your email traffic. ß) But i might wrong if i interprete your situation wrong... cheers, niels. -- --- Niels Dettenbach Syndicat IT & Internet https://www.syndicat.com PGP: https://syndicat.com/pub_key.asc --- _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
