#
# domain1.tld
#
user1@domain1.tld			some-user@aol.com
user5@domain1.tld			some-user@aol.com
user6@domain1.tld			some-user@aol.com
#
# domain3.tld
#
user22@domain3.tld			user22@some-domain.com
user23@domain3.tld			user22@some-domain.com
user24@domain3.tld			another-user@aol.com
#
# domain4.tld
#
user25@domain4.tld			a-user@msn.com
webmaster@domain4.tld			a-user@msn.com