Bare-bones but super reliable and easy to use.

I use several different email service providers, each for a different reason. I use Mailgun almost exclusively for inbound mail processing. The inbound processing also offers a preliminary spam filter so that at least most of the spam isn't sent further down my process chain. It's super easy to set up inbound routes using specific strings or wildcard matches that will accept mail and forward to multiple different recipients. These recipients can be either proper email addresses or webhook endpoints. I often use the address forwarders in combination with the SMTP outbound service to build a system where Gmail users can use their free gmail.com account to receive and send emails from their small business domain without having to sign up for and configure a proper G Suite account. I use the webhook forwarders in combination with Zapier and Integromat to receive any emails that need to be processed and automatically acted on. Mailgun normalizes all the different types of email and attachment encodings and packages the message data into an easy-to-parse JSON package that makes it super easy for me to grab what I need and reliably act on the normalized data.

Pros

Inbound mail processing with spam filter Free tier offers great sending limit SMTP and API integration for outbound messaging

Cons

This product doesn't offer any sort of backend mail building or sending functionality. It's only an engine for sending messages. This means you'll have to build your messages somewhere else and integrate them into your sending code.

Incredible Deliverability, Clean Platform, Success with MailGun!

Super pleasant, great chat support, fast email support replies, always quick to help and communicate.

Pros

Clean UXI for navigating the system, simple set up, clear dashboard to find issues quickly and navigate around the site. Ability to clean database lists to minimize bounce. However, the BEST part is they are free up to 10,000 emails a month, which is a ton! So to give the full custom power of connecting your domain and sending out, that's a huge value. I will get over that limit and upgrade soon, but that is an incredible way to start a relationship. Almost a year of free service to use their system versus my server.

Cons

I actually have not found anything that I do not like. Many will complain about high bounce rates or going into spam. I find that issue arrises on multiple factors outside of mailgun control, such as the receiving server, and the mail habits of the person opening it, do they get a bunch of spammy mail already? And was the mail piece written in a poor nature, this increases spam folder direction, however, they do have dedicated IP service for those wanting to mitigate one area of cause for spam direction. Again, never been my experience.

They Delete your account without warning

Pros

Sends emails, sometimes. Most of the time it took a while to get the emails sent. They have a free plan, but limited.

Cons

Free plan is no good Emails have delays all the time Shared IP has issues with spam all the time, good luck sending to yahoo or other big companies They will delete your account if they do not make money from you Customer Service is hard to contact, and when you do, it takes them 24 hours for each response

Mailgun is great!

Overall I have been super satisfied with using Mailgun to handle all the mail processing from my website.

Pros

Mailgun has a great API and ability to configure just about anything you need when it comes to sending email. Their UI is very clean and it isn't super cluttered with things you don't need. It was easy to find what I was looking for and easy to configure the settings.

Cons

Honestly, I haven't been able to find something that I haven't liked about using Mailgun. It is really a solid platform.

Simplify your email sending

We use mailgun for all of our transactional email. We manage, from a single account, a lot of our domains. We always have detailed insight into what is happening with our email deliveries. When things go wrong, there is enough information to find the cause.

Pros

Ease of setup. Transparent pricing. Free tier goes up until a really high scale. Can use it via API or smtp, whatever you need.

Cons

Support is a little slow for non paying plans, but that is expected. There are no alarms in place for when something starts going wrong unexpectedly.