SaaSHub helps you find the best software and product alternatives Learn more →
Top 23 Python SMTP Projects
-
Mail-in-a-Box
Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.
I looked into Purelymail when searching around for good email solution. Google Workspace was getting a bit costly and there were too many things I did not need.
Zoho Mail provides another option - $1.95 per month I think for my use where I am (AU) and has all the features I need for my small indie business.
One other option I tried was to actually run mail myself with Linode VPS - https://mailinabox.email/
I know it sounds a little scary at the start running your own thing, but so far it's been working out great - zero issues so far. I may turn off Zoho one day and go fully into self-hosted option.
-
InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
-
Project mention: Self-hosting like a final boss: what I actually run on my home lab (and why) | dev.to | 2025-06-19
Mailcow / Mailu
-
-
-
-
-
espoofer
An email spoofing testing tool that aims to bypass SPF/DKIM/DMARC and forge DKIM signatures.🍻
-
SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
-
X-osint
This is an Open source intelligent framework ie an osint tool which gathers valid information about a phone number, user's email address, perform VIN Osint, and reverse, perform subdomain enumeration, able to find email from a name, and so much more. Best osint tool for Termux and linux
-
email-oauth2-proxy
An IMAP/POP/SMTP proxy that transparently adds OAuth 2.0 authentication for email clients that don't support this method.
-
-
mailcat
Find existing email addresses by nickname using API/SMTP checking methods without user notification. Please, don't hesitate to improve cat's job! 🐱🔎 📬
-
-
-
marrow.mailer
A light-weight, modular, message representation and mail delivery framework for Python. (by marrow)
-
-
power-mailinabox
A Mail-in-a-Box with extra capabilities and more customizability. Not just for power users!
-
emailSpam
An email spam bot written in Python, to send emails to specified addresses. Use with caution.
-
-
-
-
-
flask-mailing
Flask-Mailing is the ultimate solution for sending emails asynchronously in Flask applications. With its extensive features such as support for multiple email providers, file attachments, customizable templates, and encryption, Flask-Mailing makes email communication effortless and efficient.
-
-
SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Python SMTP discussion
Python SMTP related posts
-
I Got Gemini to Figure Out My Nephew's Name
-
Purelymail: Cheap Email for Everyone
-
Ask HN: Are you aware of a sane path to selfhosted email server?
-
Ask HN: Do you run your own DNS servers?
-
Mailrise: An SMTP gateway for Apprise notifications
-
Mail-in-a-Box – Take back control of your email
-
Ask HN: Self Hosting an Email Server?
-
A note from our sponsor - SaaSHub
www.saashub.com | 21 Jun 2025
Index
What are some of the best open-source SMTP projects in Python? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Mail-in-a-Box | 14,545 |
| 2 | Mailu | 6,548 |
| 3 | Twisted | 5,800 |
| 4 | Gopherus | 3,033 |
| 5 | yagmail | 2,687 |
| 6 | fapro | 1,583 |
| 7 | espoofer | 1,546 |
| 8 | X-osint | 1,434 |
| 9 | email-oauth2-proxy | 1,089 |
| 10 | mailrise | 1,015 |
| 11 | mailcat | 700 |
| 12 | red-mail | 408 |
| 13 | aiosmtpd | 342 |
| 14 | marrow.mailer | 281 |
| 15 | smtp-email-spoofer-py | 242 |
| 16 | power-mailinabox | 189 |
| 17 | emailSpam | 97 |
| 18 | autoconfig | 70 |
| 19 | emailbomber | 68 |
| 20 | polog | 62 |
| 21 | spam_box | 44 |
| 22 | flask-mailing | 36 |
| 23 | fastapi-mailman | 19 |
Sponsored
InfluxDB – Built for High-Performance Time Series Workloads
InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
www.influxdata.com