# Email Channel

The email channel is used to handle all incoming emails in to new tickets and replies.

## Settings

   Setting Name Description   Default Priority The priority that is set on all new tickets opened by email. This is set to 'Low' by default on a new installation.   Prioritise Reply-To If you accept emails from automated systems that use a 'Reply-To' email header, you can use that email header to decide the user on a new ticket instead of the 'From' email header that is normally used.   Enable Sub-addresses  When this feature is enabled, an encoded ticket number will be included in the 'Reply-To' address header of outbound emails related to tickets. For example, it might appear as `support+23493428@my.company`. That allows the help desk to efficiently identify the ticket to which an email reply pertains.   **Email Server Support**  
 Use of this feature depends on your email server's support for sub-addressing, sometimes referred to as plus addressing. If your email server does not support sub-addresses, emails sent by the helpdesk could be returned as undeliverable. 

    Reject Duplicate Emails Stop emails being imported more than once, detected based on the Message-ID header.  ### Rate Limiting

   Setting Name Description   Max Requests Set the maximum number of requests before a user is throttled.   Decay Time The number of minutes until the available attempts are reset.   Exclude Addresses A list of email addresses which are excluded from rate limits.