Do not create accounts with these names
Common names are priority targets for brute force attacks. Avoid creating email and account names including words listed below. The data has been collected from a vast number of attempts, chosen the most frequent ones, plus some random sampling. Ironically, pretty sure these keywords will only attract more spam, but I hope it helps someone.
PS: Also avoid using your domain name or obvious abbr. for your domain name in your accounts.
admin
webadmin
test
test1
public
demo
ftpuser
ftpadmin
contact
testuser
upload
root – obviously
administrator
info
support
sales
recruit
guest
backup
postmaster
anonymous
marketing