to remove the unwanted address

[MESH]

whenever i try to connect to internet and to reah my e-
mail,i am connected to a strange and unwanted address. i
am not able to remove this address. for example, i
clear,remove,delete this addrss. type my e-mail address
and i open my e-mail, but when I am done, disconnet from
internet. next time when I turn on the computer, this
strange and unwanted address still there and connects me
to the unwanted address. Also during readinng my e-mail,
or any oher application this unwanted address sending me
unwanted materials over e-mail or other application i am
working on. i appreciate your helpme to remove this
addrss from my computer.