TCP/IP Port Numbers - MailSite Answers on all TCP/IP Addresses Assigned MailSite is designed to answer on all incoming TCP/IP port calls for all addresses assigned to the physical server. In MailSite 6 and later you can bind specific IP's to the services such that they only answer on those IP's. These IP addresses must exist on the local NIC card. To bind an IP, select the properties of the relavent service in MailSite console and select 'port'. Enter a list of IP's separated by a comma. If you are using this option, you should always add 127.0.0.1 (for Express to function) in addition to the other IP(s). The MailSite services answer to the following ports and are all configurable under the MailSite Console Services section:

• n/a - SMTPDA - MailSite SMTP Delivery Agent *
•   25 - SMTPRA - MailSite SMTP Receiver
• 110 - POP3A - MailSite POP3 Server
• 143 - IMAP4A - MailSite IMPAP4 Server
• 106 - MAILMA - MailSIte Mail Management Server
•   90 - HTTPMA - MailSite HTTP Management Agent *
• 388 - LDAP3A - MailSIte LDAP Directory Server *
•   80 - HTTP - Internet Web Access *

* Read notes section for additional information (must read)

Additional Notes:
So you must ensure that your DNS records are properly configured so that a telnet session call to port 25 to an MX record will access the correct TCP/IP port address assigned to the virtual domain you have assigned it to in the MailSite console.

• n/a - SMTPDA - Does not need TCP/IP port assignment. This service makes outbound connections to the Internet on port 25 to connect to other mail servers to send email.
•   90 - HTTPMA - MailSite Web Management Console
• 388 - LDAP3A - MailSite sets by default & may conflict with Active Directory - port 389 is recommended
•   80 - HTTP - Configurable in Windows OS IIS section, not in MailSite - used by MailSite Express (browser access)

References & Resources:
MailSite Administration Guide (Windows Console Reference - Service Section)