One thing that bothers me quite a bit and I’ve heard others complain about it, too, is the amount of automated spam emails that are sent to domain owners to try and sell domain names. These emails are pitching domain names that are similar to names already owned by the recipient, so if a person owns thousands of emails, they probably receive a whole lot of spam.
The most recent example of one I received was an email trying to sell me Top-Notch-Domains.com, since I own the non-hyphenated version. I received several emails (all appropriately caught by my spam filter), but it was annoying to continue to see multiple emails about the same domain name.
The email contained an opt out link, but you may want to think twice about opting out this way. When you opt out, it lets the sender know there’s someone on the receiving end of the email, and that may make them send even more emails about other domain names, possibly from other email accounts.
When I get these emails, I generally prefer to copy some of the language that is the same in all emails and add a filter to automatically delete these emails upon receipt. If you want to be even more aggressive, you can report these emails by forwarding them (headers included) to firstname.lastname@example.org, which was set up by the Federal Trade Commission. If you are technically inclined, you may also want to trace the headers and report the spam to the sender’s hosting company.