Run the command telnet [host] port for example: -telnet mail.domain.tld 25 Right after the connection is established
It has become apparent that spammers are getting even smarter than we take them for. Rather than abuse open relays, which are almost non-existent, these scum-of-the-earth ‘traders’ are now abusing contact forms.
PHP Contact form with image verification.
PHP Email Class: Email form & class with image verification (antispambot protection).