Just wondering what your experiences using Action Mailer are.

https://sendgrid.com/email-delivery/ I suspect mandrill and mailgun will have similar stuff. I use mailgun for some personal domains because they allow some pretty nice rule based delivery

better to use one of those services
they usually have a free tier if you’re not doing much traffic

Amazon SES works well and is priced per volume?

If you're only doing a small number of transactional emails (password resets, payment receipts, system alerts) I'd highly recommend Postmark
 
I'm not affiliated with them in any way. I'm just impressed with their platform, api and documentation.

I don’t recommend using Gmail either. I did so on a project due to my client’s preference (using/paying for Google apps/accounts) but we experienced lost/rejected emails and it’s not obvious what happened. Even more annoying, sending the email from the server/app would get blocked, sometimes, but sending it manually always works. As far as I can say, sometimes they’d block the connection (probably their firewall), wrongly assuming it’s some malicious bot

I would also second using a free tier of any dedicated mail delivery company like that (sendgrid/postmark/mandrill etc). SES takes a bit of setup, and any consumer level provider like gmail is gonna bump into deliverability weirdness because they’re not intended to be API driven. Pretty much all of those services offer free tier in the ballpark of thousands of emails per month free.

Thanks everyone. Ya, I had my reservations about GSuite. I've gone with Mandrill seeming as we already use mailchimp and our marketing guy can handle the templates.