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I need to enter the SMTP Address for it to work.
Are you sending this out of your ISPs SMTP mail server? Or is this an exchange server?
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I've tried entering the SMTP Address that my ISP has given me, but that fails to work.
If your ISP gave you the SMTP address but it "fails to work" it could be a configuration issue. Also, does this SMTP server require any type of user authentication on your part? What email program are you using?
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Is there a seperate SMTP address that I dont know about?
No. Email comes in POP3 (110) goes out SMTP (25).
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How do I find out what it is?
Heres a little secret type this in the command prompt
Good way to get mail servers is to use
netsh diag show test
From my BOX
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Microsoft Windows XP [Version 5.1.2600]
© Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\irongeek>netsh diag show test
Default Outlook Express Mail (pop.earthlink.net / smtp.earthlink.net)
InBoundMailPort = 110
InBoundMailServer = pop.earthlink.net
Ping request could not find host pop.earthlink.net. Please check the
name and try again.
Unable to connect to pop.earthlink.net port 110
OutBoundMailPort = 25
OutBoundMailServer = smtp.earthlink.net
this will display the mail servers for you. Hope this helps.