I get surprisingly little. There's about 15 addresses that are persistent, and they're all caught by the spam filters. The most important job is to set up SPF a

I get surprisingly little. There's about 15 addresses that are persistent, and they're all caught by the spam filters. The most important job is to set up SPF and DKIM properly so spammers can't impersonate your domain and send as though FROM you, rather than TO you.