check this part
1)
v_connection := UTL_SMTP.OPEN_CONNECTION('this is emptyinur code',25);

2)
UTL_SMTP.HELO(v_connection,'this is emptyinur code');

>>> already had checked with bogus smtp host - i got expected error - Service not available


I think one cant [email protected]

Pl. try to give a valid address and see if it works.

>>> i gave actual valid e mail id's, accounts for which exist. didnt post them here cz they belong to actual live people