NetMail provides email access to legacy MS-DOS applications.
It was originally programmed for TransNet, but later proved successful on its own. Features are:
You can get the releases here:
You can find packet drivers here:
Under MS-DOS a Novell packet driver supporting the installed Ethernet card is required. For a dial-up connection you can use the NetDial dialer available with the releases (to avoid handshaking problems, use the crtscts and modem switches). Then, depending on the protocol, load a PPP or SLIP packet driver. For PPP I recommend the DOSPPPD and LSPPP packet drivers. For SLIP I recommend the SLIPPER packet driver.
Under Windows you should use NetMail for Windows, it connects to the net natively. For dial-up, remote access service is supported.
There are some third-part tools available for NetMail: