|The effect of this test tool is visual. It shows what various encrypt methods should look like. You choose your default encryption method not here but from the options "configurations". Examples:
MD5 = $1$s0yfoqOn$i6Nr5nPSAhuqxbk.h.EJn/ In this MD5 password string, the characters between the 2nd and 3rd "$" are the 8-chars (maximum) of 'Salt' used to create the RSA password which follows the 3rd "$".
md5sum = 9cd234f150c500d196fbad63d2877bb2 or md5 hash is a one-way hash algorithm defined by RFC1321. On the command line type "md5 -s encrypthelp" for identical 128 bit digital signature of the password string.
crypt = MBQF2l2BTiTbM or UNIX crypt is based on a DES algorithm with a standard 2-char "salt". The first two chars define the salt which perturbs the algorithm in one of 4096 different ways.
DbMail uses "crypt", "md5" and "md5sum" in addition to clear text (plain). Hopefully this helps you decide your password policies. (For future admin use, SHA1 and MD5hash_key (using salt/string/key) are shown here.)