He's saying the @gmail.com domain is useless to him, because it he gets so much spam from it.
I could certainly see that being the case, and if you can block the whole domain and whitelist the few contacts you actually have, it probably could work decently well.
I experienced it maybe a couple of months ago. Then it went away. Since so many use gmail, it's only logical for the spammers to focus on playing gmail filters and one obvious factor would be using a gmail address as the source.
I could certainly see that being the case, and if you can block the whole domain and whitelist the few contacts you actually have, it probably could work decently well.