I’ve had a lot of calls today from clients, friends that use cogeco as their internet provider to send emails out; of the following error: he following message to <EMAIL@fpm3.com> was undeliverable. The reason for the problem: 5.1.0 – Unknown address error 553-’Your IP (216.232.12.13) is on one or more DNS blacklists. (#5.1.1)’ I’ve confirmed [...]