Why cant send emails from yahoo?

asslam-e-alikum,
sir my name is shoaib saeed and my mother name is naseem akhter
I want to ask one question i was doing job at zong but my boss
disheart me no promotion when they promoted me then unfortunately I
feel unhappy so i do a very blinder mistake i leave the office.i know
that this was very big mistake i do .
I submitted my papers but not replie yet so please tell me what may i
do can i go at abroad if yes then whose country will be better for me

best regards
shoaib saeed kayani