| Extension | Description |
| .CNM | Individual new mail folder messages |
| .PMA | Unused (obsolete address book master file) |
| .PMB | Unused (obsolete address book master file) |
| .PMC | WinPMail v3.0 textual rule files. |
| .PMD | Dictionary files |
| .PME | Rule files (DOS version) |
| .PMF | Attachment files |
| .PMG | Index files for unix mailbox (.MBX) folders. |
| .PMH | Unused (obsolete DOS version archive files) |
| .PMI | Folder index files |
| .PMJ | WinPMail State Files |
| .PMK | Keyboard files (DOS version) |
| .PML | Distribution lists |
| .PMM | Folder master files |
| .PMN | Annotation files |
| .PMO | Message drafts |
| .PMP | Notepad files |
| .PMQ | New mail and copy-to-self filtering rule files |
| .PMR | Address book master files |
| .PMS | Signature files |
| .PMT | Tray container files |
| .PMU | Macro files (DOS version) |
| .PMV | Rule files (Windows version) |
| .PMW | Queued mail (reloadable format) |
| .PMX | Queued mail (final form) |
| .PMY | Unused |
| .PMZ | Scrapbook file (DOS version only, SCRAPBK.PMZ only) |
| .PM! | Address book index files |
| .PM$ | Temporary files (you may manually delete any you find after closing Pegasus Mail) |
| .PM0 | Desktop files (WinPMail only, DESKTOP.PM0 only) |
| .PM1 | Secondary address book index files (sorted by key) |
| .PM3 | Pegasus Mail v3.x secure folder |
| .PM4 | Macintosh version general filtering rules files |
| .PM5 | Pegasus Mail for Windows regular Template files |
| .PM6 | Pegasus Mail for Windows reply Template files |
| .PM7 | WinPMail folder manager desktop file. |
| .PNM | WinPMail/Mercury IMAP UID mapping files |
Filenames reserved by Pegasus Mail
| Filename | Description |
| RULES.PMQ | New mail filtering rules (DOS version) |
| WINRULES.PMQ | New mail opening filtering rules (Windows version)
|
| WINRULEA.PMQ | New mail closing filtering rules (Windows version)
|
| WPMCSELF.PMQ | Copy-to-self filtering rules (Windows version)
|
| MACRULES.PMQ | New mail opening filtering rules (Mac version)
|
| MACRULEA.PMQ | New mail closing filtering rules (Mac version)
|
| MACCSELF.PMQ | Copy-to-self filtering rules (Mac version)
|
| DESKTOP.PM0 | Desktop file (Windows version)
|
| SCRAPBK.PMZ | Scrapbook file (DOS version)
|
| WINPMFUA.PM | Recently-used addresses list
|
| WINPMFUP.PM | Recently-used paths
|
| TCPDEBUG.WPM | TCP/IP session trace (Windows version)
|
| VIEWER.PM | Attachment viewer definitions (Windows version)
|
| TRAYSAVE.PM | Contains folders cut from hierarchy waiting to be pasted
|
| GLOSSARY.PM | Glossary data file
|
| MEMORY.PM | "Leave mail on server" memory file (Windows version)
|
| FILETYPE.PM | Attachment type mapping information
|
| MIME-MAP.PM | MIME Content-type<-->attachment-type mapping information
|
| HIERARCH.PM | Pegasus Mail folder hierarchy database (WinPMail v3.x)
|
| STATE.PMJ | Master state file for WinPMail v3.x and later
|
Keywords: EXTENSIONS FILETYPES RESERVED CNM PMA PMB PMC PMD PME PMF
PMG PMH PMI PMJ PMK PML PMM PMN PMO PMP PMQ PMR PMS PMT
PMU PMV PMW PMX PMY PMZ PM! PM0 PM1 PM3 PM4 PM5 PM6 PM7
PNM RULES WINRULES WINRULEA WPMCSELF MACRULES MACRULEA MACCSELF
DESKTOP SCRAPBK WINPMFUA WINPMFUP TCPDEBUG VIEWER TRAYSAVE
GLOSSARY MEMORY FILETYPE MIME-MAP HIERARCH STATE