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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: v1.7.0
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ref-go-smtprela...
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Bernhard Froehlich fd1214442c Bump used Go versions to 1.17 3 жил өмнө
.github 0ee982ea31 Bump used Go versions to 1.17 3 жил өмнө
cmd 009ae8f73a hasher: Check number of arguments 4 жил өмнө
LICENSE c707438ae8 Update MIT license template 6 жил өмнө
README.md 2afbe67407 Add Go Report Card badge 5 жил өмнө
auth.go 7f34fcbc99 gofmt: Fix formatting 4 жил өмнө
auth_test.go 7f34fcbc99 gofmt: Fix formatting 4 жил өмнө
config.go d8860fc917 Added external command support. 4 жил өмнө
config_test.go 441a53cfd9 Fix code formatting with gofmt -s 4 жил өмнө
go.mod 3aecd3c6d6 Bump chrj/smtpd from 0.3.0 to 0.3.1 3 жил өмнө
go.sum 3aecd3c6d6 Bump chrj/smtpd from 0.3.0 to 0.3.1 3 жил өмнө
logger.go 441a53cfd9 Fix code formatting with gofmt -s 4 жил өмнө
main.go 3f627d3281 Move AddReceivedLine before further processing. 4 жил өмнө
main_test.go 7f34fcbc99 gofmt: Fix formatting 4 жил өмнө
smtp.go b36ed8eddb net/smtp: adds support for the SMTPUTF8 extension 4 жил өмнө
smtprelay.ini d8860fc917 Added external command support. 4 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