ContactClean offers a webservice to keep your address lists up-to-date. You send the webservice a list of "one-way" encoded emails, if the code matches the database we send an email, with your details, to the customer to get their permission and, if given, the system returns their new email address to you the next time you run a check.

And this all happens completely automatically.

The "one-way" encoding ensures the ownership of your data. There's no way the webservice can "harvest" your list, a match can only occur if the user registered themselves with us - beware of data cleansing companies that don't take this step!

The verification step is also vital - ContactClean will not support spammers or any company that sends unwelcome and unsolicited messages.

Look into your CRM system and see if it has ContactClean technology, and if not ask your vendor why not!