Pocket Campaign is the best way to send personalized mass-emails to a group of friends, family, and business associates.
Have you ever received a message like "Dear Friend. As one of my most trusted friends I wanted to ask you..."? You think immediately "Yeah, right. How many people did this person sent this to?". Since regular mail software is not made for mass-mailings, senders usually put their contacts on the BCC, and have no way to personalize the message. But these messages dont look genuine, and are ineffective.
With Pocket Campaign, each person will see only his or her name and email address. So Paul will get a message like "Dear Paul. As I know you have been very involved in marketing, I wanted to ask your opinion on..." - Personalized mass-mailings are very effective.
There is no way for Paul to tell you sent this message to other people. The "From:" address will not show something like "sent via mailgun.com" or any other way to tell your message was not a unique message from you to him.
If you know about MailChimp, or Constant Contact, you get the idea of Pocket Campaign. If you have thousands of email to send, these services are the right solution for you.
Some people, however, dont want to pay monthly fees for those services, perhaps because they dont send a lot of emails per month, or their lists are small. Some people prefer not to upload their list of clients to a third party, because of privacy concerns. If that is the case, try Pocket Campaign. You will love it.