Magento misused to send Spam - My host have blocked the site
We have recently received an e-mail from our web-host that our site had been blocked due to "many suspicious e-mails are being sent out". We thought that we had already fixed this as we have changed all passwords, but it only lasted a very short while. The new massage we got is saying that it's coming from this path: /public_html/lib/Zend/Mail/Transport/Sendmail.php
Now my question is, can we do something to just stop it from the sendmail.php ? We just want to be apple to go on the website shortly so we can move from Magento to Wordpress as it's a lot easier for my mom (it's her website). So pretty much everything will be deleted afterwards anyway.