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Project description
nullsmtp
nullsmtp is a fake SMTP server (written in python) which can be used for development. The server catches incoming mail, writes them to a file, and doesn’t actually send it out to the intended recipients. All emails are saved to a directory (defaults to /var/log/nullsmtp, but can be changed via flag) where each email address sent to gets its own folder and then emails are stored in that folder named {sender}.{time}.msg. This is useful for debugging applications where you don’t want a GUI (as you’re running a headless VM say), but still actually need to see the messages that were sent in the system, without having to worry about things getting bounced or whatever.
Generally, you’d probably want to install this instead of something like sendmail or some other package that would handle sending mail from your server.
Requirements
nullsmtp relies on Python 3.3+ and just its standard library. Recommended to also have pip for installation.
Installation
Recommended Installation is through PyPi:
pip install nullsmtp
Or if you’ve cloned the repository:
python3 setup.py install
Usage
usage: nullsmtp [-h] [-H HOST] [-P PORT] [--mail-dir MAIL_DIR] optional arguments: -h, --help show this help message and exit -H HOST, --host HOST Host to listen on (defaults to localhost) -P PORT, --port PORT Port to listen on (defaults to 22) --mail-dir MAIL_DIR Location to write email logs (defaults to /var/log/nullsmtp)
By default, you will need to use sudo as the server wants to bind itself to localhost and port 22. However, if you use a different port, then it will not require using sudo. However, note, that if the current running user of the script does not have access to create a directory/file within /var/log or /var/log/nullsmtp, then no emails will be written to file, but just through the console.
If the mail directory is writeable to, then you should have the following directory structure:
nullsmtp.log person1@example.com/ person2@example.com.1492024462.msg person2@example.com.1492024232.msg person1@example.com.1493678462.msg person2@example.com/ person1@example.com.1232421423.msg
where nullsmtp.log is just a system level log file, and then each folder represents a person’s “inbox” and inside are messages from someone at a given timestamp (seconds from epoch).
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