Support synchronous methods about jmailtm HOT 2 CLOSED

Maybe could use shutdown hook to terminate Thread Pool in the end of the program, but It more looks like a punt than a solution.
I'll choose option 1, and add some synchronous versions of some methods.
I will make pull request when work's done :D

from jmailtm.

sorry i accidentally clicked closed lol
well i was planning to shift to FutureTask & Thread pool executor as you said its not a good practice to create new thread all time
but then it will not exit the program (in case someone making a script to do some specify task) so i made it that way so that the developer using this library can use Thread pool in their code using synchronous methods (which i missed for few methods thanks for creating an issue) provided in the lib that's why i would like to stick to legacy methods.
still you can make a pull request if you want.

from jmailtm.