Cuttlefish.io is described as 'Cuttlefish offers basic bounce email handling, ensuring you maintain your good mail reputation by not resending to bounced addresses'. There are more than 50 alternatives to Cuttlefish.io for a variety of platforms, including Online / Web-based, SaaS, Windows, iPhone and iPad. The best alternative is Mailchimp, which is free. Other great apps like Cuttlefish.io are Sendinblue (Freemium), HelpCrunch (Paid), Mailgun (Paid) and Sendgrid (Freemium).
Kingmailer offers transactional SMTP, which lets you send, receive and route emails. Best use case is for SaaS, Forums and e-Commerce sites. It's ideal for sending email notifications. You get a clean IP address and Kingmailer offers 99% inbox rate.
Amazon Simple Email Service (Amazon SES) is a cost-effective outbound-only email-sending service built on the reliable and scalable infrastructure that Amazon.com has developed to serve its own customer base.
SMTP2GO is an email service provider, performing the task of reliably delivering transactional and marketing emails, and providing reporting tools to track and visualize what is happening with outgoing emails.
A group list is a great way to manage users in a select team or group on your domain. Send to up to 200 recipients for free. For example, suppose that you have a billing team you want to group together - email@example.com, firstname.lastname@example.org, and email@example.com.