im having an issue connecting to my mail server on port 25 i can connect to it on port 25 on the linux box through - telnet localhost 25 i can also connect to it through my windows machine on the LAN using the same above command. Code: dns:/home/admin# telnet 10.0.0.10 25 Trying 10.0.0.10... Connected to 10.0.0.10. Escape character is '^]'. 220 alexalextest.dyndns.org ESMTP Postfix (Debian/GNU) but when i try and connect to it from another location (over the internet) it just comes up with a blanking cursor and no prompt, which then forces me to ctrl c to get out, i have checked all postfix config files and ive followed the perfect setup howto on the forums - im using debian 3.1r2 here is my main.conf Code: # See /usr/share/postfix/main.cf.dist for a commented, more complete version smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h myhostname = alexalextest.dyndns.org alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname #mydestination = dns.strangled.net, localhost, localhost.localdomain, localhost relayhost = mynetworks = 127.0.0.0/8 mailbox_command = procmail -a "$EXTENSION" mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all smtpd_sasl_local_domain = smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous broken_sasl_auth_clients = yes smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,rejec smtpd_tls_auth_only = no smtp_use_tls = yes smtpd_use_tls = yes smtp_tls_note_starttls_offer = yes smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt tls_random_source = dev:/dev/urandom virtual_maps = hash:/etc/postfix/virtusertable mydestination = /etc/postfix/local-host-names my hostnames are set correctly, i have double checked everything and i cant seem to findout why i cant connect to my server from an outside internet ip address, i have DMZ set on my router to foward to my servers ip address agian i can connect to the server and it comes up with the smtp prompt from within the local lan and localhost, so im stumped, can anyone give any clues?