SMTP relays: rankings and reviews
SMTP relays are drop-in services that send email for apps and systems that already speak SMTP. This page collects our rankings and reviews of SMTP relays, all scored against the same published criteria.
Rankings
In testing
Our first SMTP relays rankings are in progress. Each one will be listed here, from the main ranking to rankings for specific use cases.
What we test in SMTP relays
- Setup and authentication (SPF, DKIM, DMARC)
- Throughput limits and connection handling
- Logs and bounce handling
- Inbox placement at major providers
- Real cost at several monthly volumes
The full criteria and how we score them are on How we test.
Reviews
Reviews are in progress. Each will be listed here with the date we tested the tool.