threshold mail giving error

[anuraganuj]

test mail is going fine from threshold but i captuerd error when there was al alert triggered pls check the attached screen shot.

[anuraganuj]

fsockopen() an active connection was aborted to host 172.18.1.6:25 by software in your host machine
>c:/cacti/plugins/thold/class.smtp.php line 105

[anuraganuj]

i have cacti running very fine so far with all plugins pls help me for mail fsockopen problem Plzzzzzzzzzzzz