3Com Professional Handbook To enter an Internet Gateway:, To overwrite the messages in your PalmPilot inbox:

page 6PalmPilot Professional Handbook
For example, if you receive e-mail in cc:Mail from
tom@earthlink.net, the address (including the Internet Gateway)
will appear as follows: tom@earthlink.net at Internet-Mail.
In this case, “Internet-Mail” is the gateway name that you need to
enter in the Internet gateway field.
Note: The characters “ at” are not part of the Internet Gateway
name. Do not enter “ at” in this field.
To enter an Internet Gateway:
1. Type the Internet Gateway name in the Internet Gateway field.
Remember, the characters “at” are not a part of the Internet
Gateway information.
2. Click OK or press Enter to confirm your selection, close the
Change HotSync Action dialog, and return to the Custom
screen.
Desktop Overwrites PalmPilot
The Desktop Overwrites PalmPilot feature enables you to
overwrite all of the messages in your PalmPilot inbox with the
messages from your desktop inbox. You should only use this
option if, for some reason, the two inboxes get out of sync.
Note: This setting takes effect the next time you perform a
HotSync operation. Subsequent HotSync operations will return
this setting to Synchronize.
To overwrite the messages in your PalmPilot
inbox:
1. Click the Desktop Overwrite check box (so it’s checked) to
force all of the messages in your desktop inbox to overwrite
the messages in your PalmPilot organizer’s inbox. Click the
check box again to disable this feature.
2. Click OK or press Enter to confirm your selection, close the
Change HotSync Action dialog, and return to the Custom
screen.