> How do you prevent someone from spamming you with random usernames? For example: You don't, but spammers don't care that much to do what you describe. Thin

> How do you prevent someone from spamming you with random usernames? For example: You don't, but spammers don't care that much to do what you describe. Think like a spammer. Why would a spammer motivated by profit to do that on a small personal domain? It makes sense on large service (e.g. gmail, yahoo, comcast), because they might increase their audience, but on a personal domain they're just going to swamp someone's inbox in a way that makes it even less likely they'd bite.