WordPress plugin allows you to keep your WordPress contacts synchronized with your mail list in Sendcrux.
Suppose you want to send periodical email campaigns to your WordPress contacts. You will need to create a mailing list in Sendcrux and then import your contacts from WordPress to the mailing list. However, as your WordPress contacts are getting updated regularly, you need a way to propagate the updates, i.e. new or updated contact information, to the mailing list.