> Try Tools > Internet Options > Receiving > Edit and uncheck "Delete mail on server once it has been successfully received"
Also check "Download only unread mail" under the download controls.
The usual practice when retrieving mail from a POP3 host is to delete it from the host when it is successfully downloaded. If you do not delete it, you would normally expect to see it again the next time you download mail from the host. Pegasus Mail incorporates a powerful and complicated facility which allows you to leave mail on the POP3 host without deleting it, but only download mail you haven't already seen. Because the POP3 protocol does not actually provide this facility, there are some limitations on this command, the most specific being that if you run Pegasus Mail on more than one machine, each one willhave a separate list of what you have already seen; so, if you download mail using one machine then access your account later from a different machine, you will probably get the mail you downloaded the first time again, where downloading the mail on the same machine you originally used would only show mail which had arrived since the last time you accessed your account. Check this control to instruct Pegasus Mail to attempt to download only mail you have not read. The effect of this control is probably meaningless if you do not also uncheck the "Delete retrieved mail on host" control. Using this feature can significantly increase the time it takes for Pegasus Mail to retrieve your new mail.
<div>&gt;&nbsp;<span class="Apple-style-span" style="font-family: Tahoma, Arial, Helvetica; background-color: rgb(221, 221, 221); ">Try&nbsp;<i>Tools &gt; Internet Options &gt; Receiving &gt; Edit&nbsp;&nbsp;</i>and uncheck "Delete mail on server once it has been successfully received"</span></div><div>&nbsp;</div><div>Also check "Download only unread mail" under the download controls. &nbsp;</div><div>&nbsp;</div><div>The usual practice when retrieving mail from a POP3 host is to delete it from the host when it is successfully downloaded. If you do not delete it, you would normally expect to see it again the next time you download mail from the host. Pegasus Mail incorporates a powerful and complicated facility which allows you to leave mail on the POP3 host without deleting it, but only download mail you haven't already seen. Because the POP3 protocol does not actually provide this facility, there are some limitations on this command, the most specific being that if you run Pegasus Mail on more than one machine, each one willhave a separate list of what you have already seen; so, if you download mail using one machine then access your account later from a different machine, you will probably get the mail you downloaded the first time again, where downloading the mail on the same machine you originally used would only show mail which had arrived since the last time you accessed your account. Check this control to instruct Pegasus Mail to attempt to download only mail you have not read. The effect of this control is probably meaningless if you do not also uncheck the "Delete retrieved mail on host" control. Using this feature can significantly increase the time it takes for Pegasus Mail to retrieve your new mail.&nbsp;</div>