MailHog
Email and SMTP testing with web and API interface.
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Go library for sending mail with the Mailgun API.
Email and SMTP testing with web and API interface.
Email and SMTP testing tool for developers.
All-in-one (SMTP, IMAP, DKIM, DMARC, MTA-STS, DANE) email server
Modern full-featured secure mail server for low-maintenance, self-hosted email.
Golang package that generates clean, responsive HTML e-mails.