Home Explore Help
Sign In
ThebeMail
/
ref-go-smtprelay
mirror of https://github.com/decke/smtprelay.git
2
0
Fork 0
Files Issues 0 Wiki

Simple Golang SMTP relay/proxy server

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

Tree: v1.5.0
Branches Tags
ref-go-smtprela...
ZIP TAR.GZ
Bernhard Froehlich c24bc89c49 Add new Release Workflow using Github Actions and wangyoucao577/go-release-action 4 years ago
.github 5ba64c5c6e Add new Release Workflow using Github Actions and wangyoucao577/go-release-action 4 years ago
cmd 009ae8f73a hasher: Check number of arguments 4 years ago
LICENSE c707438ae8 Update MIT license template 6 years ago
README.md 2afbe67407 Add Go Report Card badge 5 years ago
auth.go 7f34fcbc99 gofmt: Fix formatting 4 years ago
auth_test.go 7f34fcbc99 gofmt: Fix formatting 4 years ago
config.go 5ba64c5c6e Add new Release Workflow using Github Actions and wangyoucao577/go-release-action 4 years ago
go.mod 97943c87e7 Update go dependencies 4 years ago
go.sum 97943c87e7 Update go dependencies 4 years ago
main.go 5ba64c5c6e Add new Release Workflow using Github Actions and wangyoucao577/go-release-action 4 years ago
main_test.go 7f34fcbc99 gofmt: Fix formatting 4 years ago
smtp.go 999ccab778 Fix spelling 5 years ago
smtprelay.ini 0e8986ca79 Expand allowedUsers email field to support comma-separated and domains (#9) 4 years ago

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