Last updated: 2000-08-11
This document is an attempt at consolidating information about mail clients with an emphasis on whether they support PGP and PGP/MIME. The information is provided in the form of tables. There is one table per operating system at the moment.
This page is purely for informational purposes only. A scientific study was not conducted in determining its contents. Stuff may be wrong. It's a work in progress. You have been warned ;-) If you see problems, for the moment, I'd suggest mentioning it on the pgp-users mailing list. If you have additions or changes to suggest, I would appreciate it if you would provide URLs where appropriate. I have nothing against operating systems not listed here and am willing to add additional ones as I get more information.
| String | Meaning |
| Native | Code for support exists in client [1] |
| Plugin | Client supports a "plugin" architecture and an appropriate plugin exists |
| Tool:X | Installing an external tool "X" provides the functionality |
| None | Document author has received what he feels is reliable information indicating no support [2] |
| UA | Unknown to document Author |
[1] As far as the author knows, in order to process PGP messages it is necessary to install a program such as PGP or GNUPG in addition to the mail client. Not that this is technically a necessity -- it's just that I've never encountered a mail client that didn't have this requirement. Exception: apparently, The Bat! has an internal PGP implementation.
[2] If something is marked "None" it doesn't mean that you can't process PGP messages manually via the clipboard or some other "manual" mechanism.
| Name | PGP | PGP/MIME | Multilingual PGP/MIME | Misc |
| Name of the client | PGP (non PGP/MIME) support | PGP/MIME support | Support for more than US-ASCII when using PGP/MIME. I will list language names here that have been reported to work. A classic case of support for a language that doesn't seem to get implemented properly is Japanese. I used to call this column "Multilingual", but people didn't seem to read this description. | Miscellaneous information |
| Name | PGP | PGP/MIME | Multilingual PGP/MIME | Misc |
| Mutt | Native | Native | ||
| Mew | Native | Native | Japanese | With appropriate hacking, Mew can also be used w/ Mailcrypt |
| Pine | Tools:pgpenvelope, pgp4pine | None | ||
| Elm | Tool:mailpgp, morepgp | UA | ||
| Wanderlust | Tool:Mailcrypt | UA | ||
| VM | Tool:Mailcrypt | UA | ||
| Gnus | Tool:Mailcrypt | UA | ||
| mh-e | Tool:Mailcrypt | UA | distributed w/ Emacs (& MH?) | |
| XFMail | Native | Native? | support for PGP 2.6.x, 5.0, 6.5, and GnuPG 1.0.x -- PGP/MIME support a little unreliable? software in transition? old link | |
| KMail | Native? | UA | support for PGP 6.x and GnuPG 1.0 | |
| XCmail | UA | Native? | ||
| Sylpheed | UA | UA | ||
| NMail | UA | UA | ||
| UCB Mail | UA | UA |
| Name | PGP | PGP/MIME | Multilingual PGP/MIME | Misc |
| Eudora Pro | Native+Plugin | Native+Plugin | I have found Japanese to not be handled correctly when using PGP/MIME | |
| Datula | Tool:PGPCmd | Native+Plugin | Japanese | |
| Edmax | Native+Plugin? | Native+Plugin | ||
| Mulberry | Native+Plugin | Native+Plugin | ||
| PMMail | Native? | Native? | Uses licensed NAI PGP | |
| Turnpike | UA | Native | ||
| The Bat! | Native or Plugin | UA | Has own PGP implementation -- based on OpenSSL | |
| Pegasus | Plugins:QDPGP, PM-PGP | UA | ||
| Lotus Notes | Plugins: bundled w/ NAI PGP 6.5.3, PGPNotes, PI Mail | UA | ||
| Novell Groupwise | Plugin | UA | ||
| MS Outlook 97/98/2000 | Plugin | UA | ||
| MS Outlook Express 4.0/5.0 | Plugin | UA | ||
| AL-Mail | Plugin | UA | ||
| Calypso | Plugin | UA | support claimed for PGP 5.5, 6.0, 6.5 | |
| Wemail | Tool:Goma2 | UA | S/MIME support w/ option, PGP5.5 support w/ Goma2 | |
| Becky! Internet Mail | Native? | UA | PGP 2.63 and PGP 5.53 are reported to be usable | |
| Netscape Messenger | Plugin, Half-Plugin | UA | "Half-Plugin" features are limited to encryption and signing -- no decryption or verification | |
| Netmail | UA | UA | ||
| Winbiff | UA | UA | ||
| Postpet | UA | UA | ||
| Mai | UA | UA | ||
| DinosaurX Internet Mail & News | UA | UA | ||
| Denshin Hachigou | UA | UA | ||
| dcMail | UA | UA | ||
| Kmail | UA | UA |
| Name | PGP | PGP/MIME | Multilingual PGP/MIME | Misc |
| Eudora Pro | Native+Plugin | Native+Plugin | ||
| Mulberry | Native+Plugin | Native+Plugin | ||
| PowerMail | UA | UA | ||
| Pegasus | UA | UA | ||
| Netscape Messenger | UA | UA | ||
| MS Outlook | UA | UA | ||
| MS Outlook Express | UA | UA |