请看以下的KB Which TCP ports does IMail use?:<br>
来源:<a target=_blank href=http://support.ipswitch.com/kb/IM-19980513-ES01.htm>http://support.ipswitch.com/kb/IM-19980513-ES01.htm</a><br>
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Question/Problem: What TCP ports does IMail use?<br>
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Answer/Solution: IMail uses the following TCP ports:<br>
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All are TCP unless otherwise noted. <br>
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25 - SMTP <br>
106 - Pserve (password server) <br>
110 - POP3 <br>
143 - IMAP4 <br>
389 - LDAP <br>
514(UDP) - SysLogd <br>
8000 & 8001 (Both UDP) - IWebMsg, IWebCal <br>
IMonitor - Web Administration - 8181 (default, configurable) <br>
IWEBMSG - Web Messaging - 8383 (default, configurable) <br>
8384 - IWebMsg - SSL <br>
8385 - Spell Checker <br>
8399 - Pserve <br>
8484 - IWebCal <br>
8485 - IWebCal - SSL <br>
Versions before 7.0 used these ports:<br>
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SMTP - 25 <br>
Password - 106 <br>
POP3 - 110 <br>
IMAP4 - 143 <br>
LDAP - 389 <br>
Web Administration - 8181 (default, configurable) <br>
Web Messaging - 8383 (default, configurable) <br>
Whois - 43 <br>Finger - 79 <br>
By the way, DNS uses UDP over port 53. <br>
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