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-# ImapMailMerge
+# [ImapMailMerge](https://gitea.dubtempo.com/NP/ImapMailMerge)
 
+Program for simulating the effect of "mail merge" for IMAP emails.  The program uses the _"Reply-To:"_ header
+to send individual messages to one or more recipients.  This helps address issues with deliverability when
+there are many _CC_ or _TO_ addresses, or when _To_ and _From_ are the same, with many _CC_ addresses.
+
+*note -- this program might not be able to send to non-local address on **shared hosting**.
+
+<br \>
+
+## Requirements
+
+Make sure all dependencies have been installed before using this program:
+
+* [PHP](https://www.php.net/) ~ tested on PHP 7.4
+* Mailserver with IMAP connectivity (can be remote)
+
+<br \>
+
+## Project Installation
+
+Install this program via git pull:
+
+```shell
+$ git clone https://gitea.dubtempo.com/NP/ImapMailMerge.git
+```
+
+<br \>
+
+## Project Usage
+
+To use this program, complete the following steps.
+
+1. Copy the sample config file "_config/config.ini.example_" to "_config/config.ini_".
+
+1. Update the variables in the config file: _config/config.ini_.
+
+1. Be sure to use the "whitelist" in the config for addresses you'd like to be able use the mailmerge.
+
+1. Run the program manually or by referencing it via cronjob.
+
+<br />
+
+## How it works
+
+Here's a basic overview of how the code works.
+
+1. Emails are sent to the mailmerge account, eg: mailmerge@example.com.
+
+1. When the program is called (eg: via cronjob), the INBOX is searched for new messages.
+
+1. Messages in the INBOX are processed in the following way:
+
+	1. The FROM address is verified against the whitelist.
+
+	1. A new IMAP directory is made based on the sender's name.
+
+	1. Sub directories are also made for that sender: Error / Fail / Success.
+
+	1. Intended recipients are deduced from the Reply-To addresses specified in the message.
+
+1. Messages are then sent via php mail().
+
+1. Upon completion, the message is moved to the appropriate IMAP directory based on the outcome of the mail() attempt.
+
+<br />
+
+## Debugging
+
+You can debug this code by looking at the error logs.  Uncomment the logging lines in ImapMailMerge.php for more info.
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