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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

شاخه: master
شاخه‌ها تگ‌ها
ref-go-smtprela...
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dependabot[bot] 4057f8df89 build(deps): Bump github/codeql-action from 3.30.2 to 3.30.3 11 ساعت پیش
.github 4057f8df89 build(deps): Bump github/codeql-action from 3.30.2 to 3.30.3 6 ساعت پیش
LICENSE c707438ae8 Update MIT license template 6 سال پیش
README.md 2358b735b1 Add badge for OpenSSF scorecard (#181) 7 ماه پیش
SECURITY.md 687c793203 Create SECURITY.md (#175) 7 ماه پیش
auth.go 7f34fcbc99 gofmt: Fix formatting 4 سال پیش
auth_test.go 7f34fcbc99 gofmt: Fix formatting 4 سال پیش
config.go 17421a539e Refactor to migrate from sirupsen/logrus to rs/zerolog and integrate DeRuina/timberjack for logfile rotation 1 ماه پیش
config_test.go 441a53cfd9 Fix code formatting with gofmt -s 4 سال پیش
go.mod 4cf2fdc492 build(deps): Bump golang.org/x/crypto from 0.41.0 to 0.42.0 1 روز پیش
go.sum 4cf2fdc492 build(deps): Bump golang.org/x/crypto from 0.41.0 to 0.42.0 1 روز پیش
logger.go 17421a539e Refactor to migrate from sirupsen/logrus to rs/zerolog and integrate DeRuina/timberjack for logfile rotation 1 ماه پیش
main.go b78cc0a5c0 Cleanup getTLSConfig() and also remove custom cipher list 1 ماه پیش
main_test.go 7f34fcbc99 gofmt: Fix formatting 4 سال پیش
remotes.go ee8a5dd989 Fix code formatting 3 سال پیش
remotes_test.go 875264837e add test coverage for scheme validation 3 سال پیش
smtp.go 085052b96a smtp: ignore HELO error in QUIT 3 ماه پیش
smtprelay.ini 51ed156dad Remove cmd/hasher for bcrypt. 3 ماه پیش

README.md

smtprelay

Go Report Card OpenSSF Scorecard

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 via a remote SMTP server without giving away my mail credentials to each device which produces mail.

Main features

  • Simple configuration with ini file .env file or environment variables
  • 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 (any SMTP server)
  • Small codebase
  • IPv6 support