To work around poisn accout create another account and then set the accunt as an alias

i.e. [email protected]  set up nestaff@netextas and set staff as alias.

The key is to not try to LOGIN with poisen accounts.

admin@*

backup@*

ftp@*

guest@*

letmein@*

mail@*

mailtest@*

mysql@*

null@*,

oracle@*

postfix@*

postmaster@*

root@*

staff@*

temp@*

test@*

tester@*

testmail@*

user@*

webmaster@*

windows@*