What are some alternatives?
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Mad Mimi - Free and subscription-based email marketing plans with Mad Mimi. Create, send, and track HTML email campaigns simply. Get a free full-featured account today.
Zoho Campaigns - Zoho Campaigns is an email marketing tool with CRM & social media integration to help you create, send and track effective email campaigns.
GetResponse - Email marketing from GetResponse. Send email newsletters, campaigns, online surveys and follow-up autoresponders. Simple, easy interface. FREE sign up.
Mailjet - All-in-one email service provider that provides maximum insight and deliverability results for both marketing and transactional emails.