A guide to Pegasus Mail filenames and file-extensions.

This page is a subset of the complete Files and extensions page. It lists only the new used files and extensions in version 4.x of Pegasus Mail for Windows.

For a full description see the page mentioned above.

Files new to WinPMail in version 4

Last update 08-Aug 2016.

Filename or extension Version information Information
CACHE.PM WinPMail v4.0+ This file contains information about the folders list that was used the last time WinPMail was started. Pegasus Mail will -at the next startup- process this list very fast and load the folders in it without further checking. If a folder cannot be loaded (has been deleted) the cache will be marked invalid and Pegasus Mail will revert to an initial check for all folders. The same happens when after loading the cache, WinPMail finds any not yet loaded folders.
The cache will be rebuild at shutdown. The cache will make Pegasus Mail startup much faster when the folder structure is not changed.
NEWCACHE.PM WinPMail v4.0+ This file contains information about the New Mail folder messages used the last time WinPMail was started. Pegasus Mail will -at the next startup- process this file very fast. The cache will make Pegasus Mail startup much faster when the folder structure is no changed.
*.PNS WinPMail v4.0+ Those files contain the formatted version of signatures.
AUTORPLC.PM WinPMail v4.0+ This file stores the settings and content for the autoreplace function in Pegasus Mail, starting version 4.0.
*.PNX WinPMail v4.0+ PNX files are the RTF version of the message bodies of any queued and draft messages that contain formatted text. The name part of the file is the same as the corresponding .PMO or .PMX or .PMW file. There should be no .PNX files without a corresponding other file.
*.PNC WinPMail v4.1+ Content Control Set definition
*.PNC.INFO WinPMail v4.2+ An "information" file for a spam definition: simply create a text file with the same name as the spam definition file and add ".info" as an extension (so, the info file for "basic.pnc" is "basic.pnc.info". Mercury displays the contents of this file when the corresponding definition is selected in the CC dialog.
*.PND WinPMail v4.2+ Those files contain connection information and other settings for POP3 and SMTP configurations.
LNK*.PNL WinPMail v4.3+ Link Folder data file.
*.PNM   Mail folder cache file showing IMAP message flag status (used by Mercury/32)
PREFIX.PM WinPMail v4.12+ This file contains words that are ignored when sorting messages by subject in a folder (like Re: (Fwd) and such). File is ascii and can be edited. Documentation in the file.
SPAMBUST.DAT WinPMail v4.0+ This file contains the commands used by the Content Control engine of Pegasus Mail for Windows and Mercury/32.
WINPMFUK.PM WinPMail v4.0+ The most recently used keywords used in the alternate editor to create messages. Tools | Options | Messages and Replies. (FUK= Frequently used keywords)
*.MBX WinPMail v3.x+ MBX Unix mail folder format (used by Eudora, Netscape, Pine, etc.)
MAILBOXP.LCK
MAILBOXM.LCK
WinPMail v4.0+ MAILBOXP.LCK: Pegasus Mail's mailbox lock file; used to keep Pegasus Mail v4.0+ sessions and Mercury/32 IMAP4 sessions from accessing the same mailbox simultaneously.
MAILBOXM.LCK: Mercury's mailbox lock file; used to keep Pegasus Mail v4.0+ sessions and Mercury/32 IMAP4 sessions from accessing the same mailbox simultaneously.
PEXLIST.PM WinPMail v4.30+ Pegasus Mail Remote Linked Graphic Exception File. The content of the option: Tools, Options, Message reader, Display Remote-linked graphics information is stored in this file.
*.PNV WinPMail v4.30+ Pegasus Mail Stored searches File.
FLsearch.PM WinPMail v4.2+ Contains the information used in the search drop-down list.
*.PMPPKG WinPMail v4.31+ You can now attach a file with the extension "*.PMPPKG" (short for "Pegasus Mail Preferences PacKaGe") to any message, and Pegasus Mail will handle it in a special fashion. If the recipient opens or double-clicks any attachment with that extension, Pegasus Mail will assume that it is a preferences package and will offer the user the option of merging the preferences settings it contains with his/her current preference settings.
The .PMPPKG file is simply a modified version of PMAIL.INI, containing any of the sections in PMAIL.INI, each section with one or more preference setting you want to alter (so, you don't have to include the whole section - you can just change one or two items): you can use command substitutions in any field; can use "x" placeholders in any of the integer block fields to preserve the current value at that position, and can use "-" in the "Default settings values" field to preserve the value at that position in the string.
.PMPPKG handling is hard-wired into the program, but can be overridden by adding entries into FILETYPE.PM (either manually or using the "Viewers" preferences page).
WI_SPH.INI WinPMail v4.4+ This file holds the information used by Pegasus Mail's Spamhalter add in and can be edited using Notepad. More information is in the file.
WORDS4.DB3 WinPMail v4.4+ An sqllite database file that holds the spam and non-spam tokens used by Pegasus Mail's Spamhalter add.
TCP*.smtp|pop WinPMail v4.5+ Files that contain session logs. They are in the TCPlog subdirectory of the MAIL folder.

If you have more information that should be placed on this page, please feel free to contact me by e-mail and I will make that information available.


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