To send a mail, edit the file Test.txt to your needs.
Then send it with:

SDLmail file.txt smtp.isp.com myemail()wherever.com destemail()wherever.com

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  126     172  73.3% -lh5- 9abc Oct 11  2006 SDLMail/ReadMe
[generic]                  258     425  60.7% -lh5- 91ca Oct  6  2002 SDLMail/README-SDL.txt
[generic]                16209   37692  43.0% -lh5- c108 Feb 16 11:16 SDLMail/SDLMail
[generic]                  245     397  61.7% -lh5- f1d5 Feb 16  1999 SDLMail/sdlmail-mos.readme
[generic]                  199     309  64.4% -lh5- df0f Feb 16 11:17 SDLMail/Source/makefile.mos
[generic]                  741    2138  34.7% -lh5- 895a May 17  2003 SDLMail/Source/SDLmail.c
[generic]                  350    1104  31.7% -lh5- e9cc May 17  2003 SDLMail/Source/SDLmail.h
[generic]                 1080    2954  36.6% -lh5- c360 Jun 25  2003 SDLMail/Source/SDLsmtp.c
[generic]                  765    2046  37.4% -lh5- 52d6 May 17  2003 SDLMail/Source/SDLsmtp.h
[generic]                  615    1738  35.4% -lh5- e1dc May 29  2003 SDLMail/Source/SDLsock.c
[generic]                  511    1462  35.0% -lh5- 64f1 May 17  2003 SDLMail/Source/SDLsock.h
[generic]                   86      89  96.6% -lh5- 9844 May 29  2003 SDLMail/test.txt
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        12 files   21185   50526  41.9%            Feb 16 06:51