Note for ISPs
  If you are reading this note, then you have most likely been contacted by a user of our spam-blocking product ChoiceMail One who is experiencing a mail problem.

ChoiceMail One is running on the user's machine and is essentially configured to behave as a proxy between the user's email application and your POP3 and SMTP servers.

ChoiceMail One has reconfigured the user's email application so that the email application now connects to ChoiceMail One instead of directly to your mail servers. That is why the SMTP and POP3 server settings in the user's email application are set to localhost. Please do not tell the user to change these server values in his or her email client.

It may also be the case that ChoiceMail has changed (or requires to be changed) the port settings in the email program from 110 (POP3) and 25 (SMTP) to new values to avoid conflicts with some other applications that are listening on those ports (typically some older style anti-virus product). Again, DO NOT TELL THE USER TO CHANGE THESE SETTINGS. The actual port settings that ChoiceMail is listening on can be found by clicking on Options | Configuration | Advanced in the ChoiceMail main window.


ChoiceMail One itself contains the settings to receive mail from your POP3 server and to send mail through your SMTP server. It supports all the usual authentication schemes if needed.

The user's POP3 settings are available in ChoiceMail One by clicking on Options | EMail Account Settings

The user's SMTP settings are available in ChoiceMail One by clicking on Options | Configuration.

These are the two places that reference the POP3 and SMTP servers respectively at your ISP.

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