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Incoming email APIs
James McKinney edited this page Aug 8, 2013
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All the following services deliver incoming email to your app via an HTTP POST web hook.
| Documentation | Cloudmailin | Mailgun | Mandrill | Postmark | Sendgrid |
|---|---|---|---|---|---|
| POST data | Sample | Sample | Sample | Sample | Sample |
| Cost per email |
free (200/mo) ¢0.30 ($9/mo) ¢0.57 ($17/mo) † ¢0.25 ($25/mo) ¢0.225 ($45/mo) ¢0.2125 ($85/mo) ¢0.20 ($200/mo) |
free (200/day) ¢0.10 ($19/mo) ¢0.05 ($59/mo) ¢0.04 ($199/mo) |
free (12k/mo) ¢0.025 ($9.95/mo) ¢0.090 (>40k) ¢0.065 (>140k) ¢0.045 (>340k) ¢0.040 (>1.34M) |
¢0.15 ¢0.05 (>500k) |
free (200/day) ¢0.085 ($79.95/mo) ¢0.050 ($199.95/mo) ¢0.045 ($399.95/mo) |
| Pricing summary | Most expensive per email | Most features | Most free emails | No monthly minimum | Most expensive starting plan |
| Custom domains | MX record | MX record | MX record | MX record | MX record |
| Message size limit |
|
25MB | 25MB‡ | 10MB | 20MB |
| Recipients limit | 20 | ||||
| Bounces | N/A | webhook, API | webhook, API | webhook, API | webhook, API |
| Retry if | 5XX HTTP code or unreachable | non-200 HTTP code | non-200 HTTP code | non-200 HTTP code | non-200 HTTP code |
| # retries | 8 hours | 10 | 3 days | ||
| Retry interval | 5 min. to 4 hours | 1 min. to 6 hours | |||
| Fail if | 4XX HTTP code | 404 or 406 code | |||
| Dedicated IP | $59/mo plan | $29.95/mo | N | $79.95/mo plan | |
| Strip quoted text | Y | Y | N | N | N |
| Parse attachments | Y | Y | Y | Y | Y |
| SPF | Y | Y | Y | Y | Y |
| DKIM | N | Y | Y | Y | Y |
| SpamAssassin | N | Y | Y | Y | Y |
| Heroku add-on | Y | Y | Y | Y | Y |
| Attachment whitelist | N | N | N | Y | N |
| Upload attachments to Amazon S3 | Y | N | N | N | N |
| Additional documentation | Email forwarding | Manual, FAQ | Email forwarding, FAQ |
† The $17/mo "Micro Plus" Cloudmailin plan is the same as the $9/mo "Micro" plan, plus custom domains and S3 attachments. ‡ The 25MB is after Base64 encoding, so the binary size is under 20MB.
Additional information:
- Google Apps will perform spam filtering before forwarding email.
- You must send or receive over 12,000 emails per month for Postmark to be more expensive than the cheapest Mailgun plan.
If you prefer not to use a third-party API to route incoming email, you can do it yourself:
The following services do not offer an incoming mail webhook: