Long gone the "no bullshit" promise, Gandi is preventing Gandimail customers to send messages via its SMTP server if they connect from a source that is in Spamhaus XBL.
It doesn't matter if they connect with SSL and have valid credentials.
To add insult to injury messages that have been blocked once are permanently refused even after changing source IP (identified fromt he server via Message-ID ?)
Has anyone experienced anything similar with other providers?
dewanee•1h ago