diff --git a/README.md b/README.md
index 1f874f2..24ca248 100644
--- a/README.md
+++ b/README.md
@@ -25,22 +25,26 @@ The email address is composed like:
## B. For NextCloud admins to setup
### Requirements
-This app requires php-curl, php-imap and Postfix.
+This app requires php-curl, php-imap and some sort of imap server (e.g. Postfix with Courier).
### NC new user
Create a new user from User Management on your NC server, which will have to function as a bot. We chose to call him *deckbot*, but you can call it however you want.
__Note__: that you have to assign *deckbot* on each board you want to add new cards from email.
-### Set up Postfix for incoming email
+### Configure Email
+#### Option 1 - Set up Postfix for incoming email
You can setup Posfix mail server folowing the instructions on [Posfix setup](https://docs.gitlab.com/ee/administration/reply_by_email_postfix_setup.html), and after that add "+" delimiter (which separe the user from the board in the email address) using the command:
```
sudo postconf -e "recipient_delimiter = +"
```
+#### Option 2 - Use an existing email server.
+This could be any hosted email service. The only requirement is that you can connect to it via the IMAP protocol.
+*Please note this option may not be as flexible as a selfhosted server. For example your email service may not support the "+"delimeter for directing messages to a specific board*
### Download and install
-Clone this repository into *incoming* user.
+If using a self-hosted Postfix server, clone this repository into *incoming* user. If not you may need to create a new user on your system and adjust the commands in future steps to match that username.
```
cd /home/incoming/
git clone https://github.com/putt1ck/mail2deck.git mail2deck
```
-Edit as you need the config file:
+Edit the config file as you need:
```
sudo nano /home/incoming/mail2deck/config.php
```
diff --git a/config.php b/config.php
index caef093..8481193 100644
--- a/config.php
+++ b/config.php
@@ -3,6 +3,7 @@ define("NC_SERVER", ""); // server.domain
define("NC_USER", "deckbot");
define("NC_PASSWORD", "");
define("MAIL_SERVER", ""); // server.domain
+define("MAIL_SERVER_FLAGS", "/no-validate-cert" // flags needed to connect to server. Refer to https://www.php.net/manual/en/function.imap-open.php for a list of valid flags.
define("MAIL_USER", "incoming");
define("MAIL_PASSWORD", "");
-?>
\ No newline at end of file
+?>
diff --git a/index.php b/index.php
index bcb688f..238e825 100644
--- a/index.php
+++ b/index.php
@@ -3,7 +3,7 @@ error_reporting(E_ERROR | E_PARSE);
require_once("config.php");
require_once('lib/DeckClass.php');
-$inbox = imap_open("{" . MAIL_SERVER . "/imap/novalidate-cert}INBOX", MAIL_USER, MAIL_PASSWORD)
+$inbox = imap_open("{" . MAIL_SERVER . "/imap" . MAIL_SERVER_FLAGS . "}INBOX", MAIL_USER, MAIL_PASSWORD)
or die("can't connect:" . imap_last_error());
$emails = imap_search($inbox, 'UNSEEN');
@@ -97,4 +97,4 @@ if ($emails)
}
imap_close($inbox);
-?>
\ No newline at end of file
+?>