|This plugin responds to properly prepared POSTs by sending a confirmation email to the designated recipient. The code is purposefully over-simplified, and is intended to be a starting point only, for developing a customized subscription list that fits your needs.|
There are many applications where sending an email in response to an HTTP POST is required. This module is a proof-of-concept plugin that demonstrates one way to send SMTP messages using the
This plugin is open-source and may be extended to provide additional features, such as:
- Accepting additional form elements such as user profile data or answers to survey questions.
- Customizing the outgoing emails with different messages based on form inputs.
- Storing email addresses using a file or database.
- Sending HTML instead of plain text.
The plugin module is available from NPM. Before proceeding, you should already have
RWSERVE configured and tested.
This module should be installed on your web server in a well-defined place, so that it can be discovered by
RWSERVE. The standard place for public domain plugins is
npm install rwserve-nodemailer
Configuration is Everything
Make the software available by declaring it in the
plugins section of your configuration file. For detailed instructions on how to do this, refer to the plugins documentation on the
Read Write Tools HTTP/2 Server website.
text Thank you for signing up today.%0D%0AThis message confirms your request to join our mailing list.%0D%0ATogether we can make it happen!
`customer-service/signup` *methods=POST *plugin=rwserve-nodemailer
How it works
The plugin receives POST requests originating from a standard
HTML <form> , which uses content-type
application/x-www-form-urlencoded. The request body should contain one form element, named
recipient, which contains an email address.
An email envelope is prepared using the given recipient plus the values for
text which are defined in the
message-defaults section of the configuration file.
The email is queued for delivery using SMTP using the values for
connectionTimeout defined in the
transport section of the configuration file. Values for
authPassword should be entirely omitted unless required by your SMTP provider.
When communication with the SMTP server is complete, the last reply code received from the transport is placed in the special header
nodemailer-smtp-reply. A value of
250 generally indicates success, and can be interpreted as "email was queued for delivery". Other values are generally failures. (Search for "smtp reply code" to help diagnose those problems.)
The HTTP request/response cycle completes with status code
200 and a response body with content-type
application/json. The returned JSON payload contains:
acceptedan array of addresses that were accepted by SMTP
rejectedan array of addresses that were rejected by SMTP
responsethe last communication from the SMTP server with reply code
messageIda unique email identifier generated by SMTP for logging
<form action='https://localhost:7443/customer-service/signup' method=POST>
<label>Email address <input type=text name=recipient /></label>
<input type=submit value=Submit />
You can also use CURL to send a request to the plugin like this:
curl https://localhost:7443/customer-service/signup -X POST -H content-type:application/x-www-form-urlencoded -H content-length:33 -d "email@example.com"
A full configuration file with typical settings for a server running on localhost port 7443, is included in this NPM module at
etc/nodemailer-config. To use this configuration file, adjust these variables if they don't match your server setup:
Once you've tested the plugin and are ready to go live, adjust your production web server's configuration in
/etc/rwserve/rwserve.conf and restart it using
systemd. . .
[user@host ~]# systemctl restart rwserve
. . . then monitor its request/response activity with
[user@host ~]# journalctl -u rwserve -ef
This is a plugin for the Read Write Tools HTTP/2 Server, which works on Linux platforms.
|Software||Minimum Version||Most Recent Version|
|Ubuntu||16 Xenial Xerus||16 Xenial Xerus|
|Debian||9 Stretch||10 Buster|
|openSUSE||openSUSE 15.1||openSUSE 15.1|
|Fedora||Fedora 27||Fedora 32|
|CentOS||CentOS 7.4||CentOS 8.1|
|RHEL||RHEL 7.8||RHEL 8.2|
|RWSERVE||RWSERVE 1.0.1||RWSERVE 1.0.47|
|Node.js||Node.js 10.3||Node.js 12.17|
|This plugin demonstrates a basic plugin that cooperates with other server software to perform non-HTTP related work. The important patterns to observe are: |
The rwserve-nodemailer plugin is licensed under the MIT License.
Copyright © 2020 Read Write Tools.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|Documentation||Read Write Hub|