Mailing lists are often rented or sold. If rented, the renter agrees to use the mailing list for only contractually agreed-upon times. The mailing list owner typically enforces this by "salting" (known as "seeding" in direct mail) the mailing list with fake addresses and creating new salts for each time the list is rented. Unscrupulous renters may attempt to bypass salts by renting several lists and merging them to find the common, valid addresses.
Using Crystal’s AI email guidance, you can see the most effective writing style, subject line, greeting and call to action to make each message most impactful for the recipient. The best part is you can predict personalities in bulk so you can send hyper-personalized emails en masse, giving your recipients the information they need in the style they want, which will benefit engagement rates, in return. It’s like having a coach for every campaign.