Downloading Email from an ISP

I have a question and I think I know the answer but I thought I would check here to confirm. I have a client with SBS 2003 currently using POP3 email and SBS SMTP. Right now the server checks email every 15 minutes and downloads from the ISP to the server and then to the users Outlook .  Is there any way to make this occur more frequently?

If we remove the ISP and the POP3 mailboxes and have the MX record updated to poin to the SBS server  and it's configured properly will the users receive email faster than every 15 minutes. Every 15 minutes seems like a liong time to have to wait if you are expecting an uregent email.

Thanks for your help!!
sccomputerAsked:
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MicrotechCommented:
If you remove the ISP the e-mails will be instant. Use smtp for all mail, this is the downside to the sbs connector.

http://www.amset.info/exchange/pop3-smtpswitch.asp
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
sccomputer,

I totally agree about the 15 minute issue.  The POP-3 connector is really designed to be a bridge solution between getting companies off their POP3 mail to a full Exchange configuration.  It's not really intended to be the permanent solution even though many companies keep using it as such.

Along with the above article that Microtech referenced, this is also a good one:
http://sbsurl.com/pop2smtp

Jeff
TechSoEasy
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