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ref-go-smtprelay
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Simple Golang SMTP relay/proxy server

Topics
#golang #proxy-server #smtp-server #smtp-relay #ssl #load-balancer

Мод: v1.4.0
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ref-go-smtprela...
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Bernhard Froehlich 4b14203296 Merge branch 'master' of github.com:decke/smtprelay 5 жил өмнө
.github 0e643f7230 Update CI to go 1.14 5 жил өмнө
cmd 076fd65dea Use default cost for bcrypt 5 жил өмнө
scripts b42ad6ddc9 Add release script as requested in #2 5 жил өмнө
LICENSE c707438ae8 Update MIT license template 6 жил өмнө
README.md 2afbe67407 Add Go Report Card badge 5 жил өмнө
auth.go d11f8d81ea Fix formatting 6 жил өмнө
config.go 53c2c27647 Support LOGIN authentication on outgoing SMTP server 5 жил өмнө
go.mod 4e0bf0908d Update dependencies 5 жил өмнө
go.sum 4e0bf0908d Update dependencies 5 жил өмнө
main.go 6f3bd16988 The check if authentication was properly done is redundant now as of smtpd v0.2.0 5 жил өмнө
smtp.go 999ccab778 Fix spelling 5 жил өмнө
smtprelay.ini 53c2c27647 Support LOGIN authentication on outgoing SMTP server 5 жил өмнө

README.md

smtprelay

Go Report Card

Simple Golang based SMTP relay/proxy server that accepts mail via SMTP and forwards it directly to another SMTP server.

Why another SMTP server?

Outgoing mails are usually send via SMTP to an MTA (Mail Transfer Agent) which is one of Postfix, Exim, Sendmail or OpenSMTPD on UNIX/Linux in most cases. You really don't want to setup and maintain any of those full blown kitchensinks yourself because they are complex, fragile and hard to configure.

My use case is simple. I need to send automatically generated mails from cron via msmtp/sSMTP/dma, mails from various services and network printers to GMail without giving away my GMail credentials to each device which produces mail.

Main features

  • Supports SMTPS/TLS (465), STARTTLS (587) and unencrypted SMTP (25)
  • Checks for sender, receiver, client IP
  • Authentication support with file (LOGIN, PLAIN)
  • Enforce encryption for authentication
  • Forwards all mail to a smarthost (GMail, MailGun or any other SMTP server)
  • Small codebase
  • IPv6 support