www.constantcontact.com (Not Free - But 60 Day Free Trial): Constant Contact email services blends your email campaigns and your social networking campaigns into a single matchless and easy-to-use service. They provide an email marketing service with 400+ customizable templates and the option to insert text or your own HTML code into the emails. you also get a 60-day-free-trial with this email marketing service.
Beyond that, avoid using all caps, too many exclamation marks, and hyperbolic phrases ("ACT NOW BEFORE TIME RUNS OUT!!!!"). Poorly formatted HTML in your emails can also hurt how they’re handled. Every spam filter is different, so an email might pass through one filter but get flagged by another. For more comprehensive info on how spam filters work and how to avoid them, check out this guide by MailChimp.
We just started using MailChimp because it seems to be the only one that offers a free account for small or new users. The problem is that there are so many steps for a potential subscriber to go through with both double opt-in and recaptcha, that we are getting at best complaints to worst, plain nasty comments posted on our Facebook page. We don’t know how many would be subscribers we lost because of this.
For example, if you set up an autoresponder with an interval of 24 and you receive an email from firstname.lastname@example.org at 8:00 AM on Monday, the autoresponder immediately responds to the message. If, however, email@example.com continues to email you throughout the day, the autoresponder does not send another response for 24 hours after the initial email (in this case, 8:00 AM on Tuesday). If firstname.lastname@example.org emails you again after the 24-hour interval expires, the system sends them an autoresponse.
This rule might sound like bad news for your email marketing campaign, but it can actually improve your open and clickthrough rates. Limiting your subscriber list to just those who specifically asked to join you will ensure only the most interested people are receiving your messages. This maximizes the chances that you'll convert readers to qualified leads as a result of an email send.
Drip offers a very small forever free plan, along with a two-week free trial for the Basic and Pro membership levels. If you choose to continue service after those two weeks, then your card will be charged. There is a 30-day refund window from when you start your service, but it’s up to the discretion of Drip whether you will receive a full refund.