Nmap scan report for mail.tds.net (129.159.94.43) Host is up (0.061s latency). rDNS record for 129.159.94.43: mail2.tds.syn-alias.com Not shown: 991 filtered tcp ports (no-response) PORT STATE SERVICE 25/tcp open smtp 80/tcp open http 110/tcp open pop3 113/tcp closed ident 143/tcp open imap 443/tcp open https 587/tcp open submission 993/tcp open imaps 995/tcp open pop3s Nmap done: 1 IP address (1 host up) scanned in 5.18 seconds