MailHog vs Mailpit: Testing Verification and Password Reset Emails with Casdoor
· 9 min read
MailHog and Mailpit are both fake SMTP servers for development: they accept every message, keep it, and show it in a web UI instead of delivering it. Both use the same default ports, SMTP on 1025 and the web UI and API on 8025, so the SMTP address is smtp://127.0.0.1:1025 and the inbox is at http://127.0.0.1:8025 for either one. The difference is maintenance: MailHog's last release, v1.0.1, came out in August 2020, while Mailpit released v1.33.0 on October 31, 2026. For a new project, use Mailpit. Casdoor sends to both through a plain SMTP provider, so you can test sign-up codes, password reset emails and magic links without a real mail account.