WhiteList - prevent false spam positives in mail

WhiteList will generate a list of all people you have mailed with.
This list is usually called a whitelist for e-mail spam, as those are real people. You can export that list as v-cards so you can add them to a group in your address book.

Features
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* shows you the top list of people you mail with.
* hierarchical view of mailboxes.
* automatically deselects mailboxes that usually contain spam (spam, junk, ...).
* select/deselect mailboxes and their child mailboxes.
* number of exporting v-cards can be adjusted.
* exporting name prefix
* exporting with a group


Background
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I do receive a lot of spam mails every day. Every now and then there are e-mails placed in the spam folder, even though Ive conversed with the people in the past.
People in the address book receive a much better non-spam value for most e-mail providers. This is were WhiteList comes in place.
WhiteList creates a list of all people in in your mails. Its ordered by the number of mails you have sent and received by that person.
You can export the list of people to a v-card file. When you upload that file to your mail providers mailbox, your mail provider then has a better idea which e-mails to accept.
Only the E-Mail address is exported by default. That way your e-mail provider does not get more information that it needs to.