alash3al/smtp2http — 556 Stars

alash3al

smtp2http

A tiny software that receive a smtp request (email) and send it to the specified webhook as a http post request

Last updated Jul 5, 2026

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Topics

#go #golang #mail #mailbox #smtp-server #smtp2http #webhook

Language breakdown

Go 95.1%

Dockerfile 4.9%

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README

SMTP2HTTP (email-to-web) ======================== smtp2http is a simple smtp server that resends the incoming email to the configured web endpoint (webhook) as a basic http post request.

Dev ===

go mod vendor
go build

Dev with Docker ============== Locally :

go mod vendor
docker build -f Dockerfile.dev -t smtp2http-dev .
docker run -p 25:25 smtp2http-dev --timeout.read=50 --timeout.write=50 --webhook=http://some.hook/api

Or build it as it comes from the repo :

docker build -t smtp2http .
docker run -p 25:25 smtp2http --timeout.read=50 --timeout.write=50 --webhook=http://some.hook/api

The timeout options are of course optional but make it easier to test in local with telnet localhost 25 Here is a telnet example payload :

HELO zeus smtp answer

MAIL FROM:<email@from.com> 
smtp answer

RCPT TO:<youremail@example.com> 
smtp answer

DATA your mail content .

Docker (production) ===== Docker images arn't available online for now See "Dev with Docker" above

docker run -p 25:25 smtp2http --webhook=http://some.hook/api

Native usage ===== smtp2http --listen=:25 --webhook=http://localhost:8080/api/smtp-hook smtp2http --help

Contribution ============ Original repo from @alash3al Thanks to @aranajuan

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