MailJet

MailJet is a mass email software tool, used to send customized emails to a list of recipients. The program can be used to send out press-releases, newsletters and announcements to your customers, subscribers and partners.

MailJet comes with a built-in mailing list manager and allows sending personalized marketing emails to a group of recipients by using tags.
You can also export your contacts from Gmail or Yahoo email accounts to a CSV file, then import the contacts to this program.