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ref-go-smtprelay
spogulis no https://github.com/decke/smtprelay.git
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Simple Golang SMTP relay/proxy server

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

Koks: 7fa0eebf95
Atzari Tagi
ref-go-smtprela...
ZIP TAR.GZ
Jonathon Reinhart 7fa0eebf95 Simplify range code for setting up listeners 4 gadi atpakaļ
.github 9040a456cf Create codeql-analysis.yml 5 gadi atpakaļ
cmd 076fd65dea Use default cost for bcrypt 5 gadi atpakaļ
scripts b42ad6ddc9 Add release script as requested in #2 5 gadi atpakaļ
LICENSE c707438ae8 Update MIT license template 6 gadi atpakaļ
README.md 2afbe67407 Add Go Report Card badge 5 gadi atpakaļ
auth.go 0e8986ca79 Expand allowedUsers email field to support comma-separated and domains (#9) 4 gadi atpakaļ
auth_test.go 0e8986ca79 Expand allowedUsers email field to support comma-separated and domains (#9) 4 gadi atpakaļ
config.go 999cfea307 Fix typo "addresses" 5 gadi atpakaļ
go.mod 4e0bf0908d Update dependencies 5 gadi atpakaļ
go.sum 4e0bf0908d Update dependencies 5 gadi atpakaļ
main.go 7fa0eebf95 Simplify range code for setting up listeners 4 gadi atpakaļ
main_test.go 0e8986ca79 Expand allowedUsers email field to support comma-separated and domains (#9) 4 gadi atpakaļ
smtp.go 999ccab778 Fix spelling 5 gadi atpakaļ
smtprelay.ini 0e8986ca79 Expand allowedUsers email field to support comma-separated and domains (#9) 4 gadi atpakaļ

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