Which email provider should I choose?
A plain-English comparison to help you pick a sending engine in 2 minutes.
Mailbo doesn't send email on its own — it connects to a sending provider you own. You pick one, paste its credentials once, and you're done. This page helps you choose.
The quick answer
- Cheapest at scale, a bit technical: Amazon SES — ~$0.10 per 1,000 emails. Best if you're comfortable in the AWS console.
- Easiest to set up: SMTP2GO, Mailgun, or Mailjet — friendly dashboards, generous-ish free tiers.
- Best deliverability for a marketing list: Mailgun or SMTP2GO. (Postmark is excellent but transactional-first — see its note below.)
You can switch providers later, so don't overthink it.
Side-by-side
| Provider | Best for | Free tier (approx) | Setup difficulty |
|---|---|---|---|
| Amazon SES | Lowest cost at volume | 3,000/mo for 12 months (new AWS) | Medium (AWS console) |
| Mailgun | All-round marketing | Trial / pay-as-you-go | Easy |
| SMTP2GO | Simple + reliable | 1,000/mo forever | Easy |
| Mailjet | EU-friendly, simple | 6,000/mo (200/day) | Easy |
| SendGrid | Established, scalable | 60-day trial only | Easy |
| MailerSend | Modern, developer-friendly | 3,000/mo (after approval) | Easy |
| Postmark | Speed & reliability | Trial | Easy (use Broadcast stream) |
| Custom SMTP | Any other provider | — | Depends |
Two things every provider needs from you: (1) a domain you own to send from (not a free Gmail/Yahoo address), and (2) a few DNS records to prove you own it. See Verify your domain.
Then connect it
Pick your provider's guide and follow it: Amazon SES · Mailgun · SendGrid · Postmark · Mailjet · SMTP2GO · MailerSend · Custom SMTP
Still have a question?
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Last updated 6/15/2026← More in Sending & Deliverability