Spamihilator - The free Anti-Spam-Filter Spamihilator removes more than 98% of spam mails before they even get into your inbox.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Mailwasher - Over 8 million people use MailWasher as their spam filter
Constant Contact - Constant Contact offers email marketing, social media marketing, online survey, event marketing, digital storefronts, and local deals tools.
SpamAssassin - Use this program to "Unspam" your mailbox(es).
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.