GPGrelay is not working fully automatical (although it hardly tries to be invisible),
there is quite some interactivity required, eg. with Autolearn-Alias or encrypting
to untrusted keys...|
Well, if this is still too much for your needs, there is an alternative to GPGrelay, called:
It's basically a Win-Port done by Timo Schulz of GEAM by Werner Koch, but unlike the original, WinGEAM is also capable of handling POP3.
GEAM is a specialized mail transport agent (MTA) which takes care of encrypting all messages leaving your company. Encryption can be configured using flexible configuration files (similar to the email aliases file). Incoming mail can optionally be decrypted when the decryption key has been installed. The software uses the PGP/MIME standard (RFC3156) for handling the mail.
|GPGrelay with SSL/TLS|
GPGrelay uses OpenSSL to connect to POP3s (POP3 over SSL) and/or SMTPs (SMTP over SSL) Servers but it doesn't contain the required OpenSSL-DLLs
so you have to obtain these DLLs separately if you want to use GPGrelay with SSL.|
For SSL/TLS-Support GPGrelay needs the two DLLs called "ssleay32.dll" (sometimes also named as "libssl32.dll") and "libeay32.dll"
You can either put them into the same folder where you have installed GPGrelay or you can put them into your Windows-Folder or any other folder that is referenced by your PATH-Environment-Variable.
Maybe you already have them on your system, but here you can also find a little zip-archive of the precompiled OpenSSL-Libraries (Version 0.9.8k, default OpenSSL-Win32-Compiler-Switches using NASM/VC++6.0; thus these binaries may be inappropriate for your use depending on your local cryptography laws, patents on algorithms available in the DLLs, or other reasons).
OpenSSL-0.9.8k.dll.zip : 552.87 KB
Keep in mind that GPGrelay can also work without them!
You only need these DLLs if you really want to use POP3s and SMTPs.
The offical OpenSSL-Site doesn't contain these DLLs in binary form due to the restrictions mentioned above, but e.g. the Stunnel-Site offers the DLLs for download too.
Another source for the DLLs is GNUwin32 - Unix Tools for Win32
Of course, you can still use Stunnel itself to get GPGrelay working with POP3s (POP3 over SSL) and/or SMTPs (SMTP over SSL). (This even has the advantage of offering some more switches you can tweak if you prefer...)
version: 0.959 ; release-date: 2005-Mar-31
GPGrelay is a single-file-executable (UPX compressed), with small-overhead install/uninstall (Nullsoft's NSIS)|
current status: stable and working beta
You shouldn't download the rather huge debug-build unless you suffer from strange crashes and want to help tracking down what goes wrong.
Additionally you should then also download DebugView from http://www.sysinternals.com to actually see the debug-messages (tracemarks).
size (installer): 645.54 KB
size (debug): 2.03 MB
size (source): 1.46 MB
Multi-language support can be found at the GPGrelay-l10n-page
Download from SourceForge-Mirror (preferred!)
GPGrelay requires at least MFC42.DLL Version 6.xx - this is normally already installed on your System, but if GPGrelay won't run at all, this could mean you have an older version.
You can obtain a version here and put it in the same folder as GPGrelay or replace the one inside the System-Folder of your Windows-Installation:
MFC42.DLL Version 6.00.8665.0 (zipped) : 442.38 KB
Another source for system-dlls is:
My Public Key (dynacore//.tSCc.)|
This project is also hosted on|
You should use the forums provided by SourceForge to ask for help, track bugs or generally discuss about GPGrelay.
There is also a GPGrelay-Mailing-List available there!
I strongly recommend it for discussion about GPGrelay!
SourceForge-Mailinglist : gpgrelay-talk
Any email to me or entry in the guestbook are still welcome!