email
disposable@example.com
invalid@example.com
valid@example.com
toxic@example.com
donotmail@example.com
spamtrap@example.com
abuse@example.com
unknown@example.com
catch_all@example.com
antispam_system@example.com
does_not_accept_mail@example.com
exception_occurred@example.com
failed_smtp_connection@example.com
failed_syntax_check@example.com
forcible_disconnect@example.com
global_suppression@example.com
greylisted@example.com
leading_period_removed@example.com
mail_server_did_not_respond@example.com
mail_server_temporary_error@example.com
mailbox_quota_exceeded@example.com
mailbox_not_found@example.com
no_dns_entries@example.com
possible_trap@example.com
possible_typo@example.com
role_based@example.com
timeout_exceeded@example.com
unroutable_ip_address@example.com
free_email@example.com
role_based_catch_all@example.com