Horde IMP is an Internet Messaging Program (IMP), a webmail system and a component of the Horde project, which allows to read and write emails using a web browser and also provides functionality such as calendaring, notes, multiple folders, address books, and mail management features for sorting and local filtering of incoming messages, i.e. it offers most of the features users have come to expect from conventional mail clients.

This article covers the trickiest topics:

Please read Horde IMP help pages available within the client by clicking on a life ring icon for other details on its usage.

Logging in

You can login to Horde IMP at http://mail.yourdomain.name or using a direct link http://webmail.intermedia.net. You should use your primary mailbox address to log in. Mailbox aliases cannot be used to log into Horde IMP, but domain aliases can.


Note: You can only log into one mailbox at a time (from a single computer) via Horde IMP. Trying to log into multiple mailboxes from the same computer at the same time will result in issues.

Note: You must have cookies enabled in your browser to log into Horde IMP. In addition, you must make sure that your browser does not cache the Horde page. If your browser caches the page, clear your browser cache to fix the problem.

Creating folders

To create a sub-folder, go to Folders, click on checkbox near Inbox (to create top-level folder) or near a desired parent folder, then select Create in Choose Action drop-down list.


Note: All folders on Postfix mail server are subfolders of Inbox.

Saving attachments in Sent Items

Horde IMP, by default, strips attachments when moving messages you sent to the Sent Items folder. This is meant to save you space by only keeping the message itself and not the attachment. To change this behavior, you will need to do the following:

  1. Select the Options icon at the top of the screen
  2. Underneath the Message Options section click on the Message Composition link
  3. In the dropdown box below When saving sent-mail, should we save attachment data? choose a desired action
  4. Click on the Save Options button


Forwarding messages without attachments

In order to prevent forwarded messages from containing the original message as an attachment, you will need to follow these steps:

  1. Click on the Options icon and the top of the screen
  2. Find the section called Message Viewing and select it
  3. Check the option Show an icon to allow stripping of attachments from messages?
  4. Save Options


Now when you go to forward a message, you can go down to the very bottom of the screen on the forwarded message and find the attachments section. You will then do the following:

  1. Seelct the Delete check box
  2. Click on the Update button


At this point, the attachment will delete itself. You can now make changes in the Text area and send your message without the attached message being forwarded.

Deleting items

To delete a message in any mode:

  1. Selecting the check box next to a message
  2. Click on the Delete link.


Depending on the mode, the behavior of deleted messages will differ. Horde can be configured to delete messages using two different methods:

  • Delete Mode: will be ‘marked’ messages for deletion. Messages are not moved to a different folder in this mode. Messages are not actually deleted until you decide to Purge your account.
  • Trash Mode: In trash mode, deleted email is moved to your Trash folder. The messages remain in your trash folder until you decide to empty the folder.

By default Horde is setup in the Delete mode. To switch to the Trash mode:

  1. Navigate to Options
  2. Go to Deleting and Moving Messages
  3. Check the When deleting messages, move them to your Trash folder instead of marking them as deleted? option
  4. Click on Save Changes.


You can also, set your Trash folder or automatically purge itself yearly, monthly, daily, or on every login. To make this change, please:

  1. Navigate to Options
  2. Login Tasks (General Option section)
  3. Set Purge Trash how often value to desired
  4. Click on Save Changes


To delete all messages at once, please

  1. Go to Folders
  2. Select a folder or a desired subfolder
  3. Select Empty from the drop-down box
  4. Click on Empty Selected Folders button

Note: Messages that are stored in Trash folder count toward overall disk and mailbox quotas.

Undeleting items

To undelete messages marked as deleted from the inbox listing:

  1. Check the checkbox to the left of the messages you wish to keep, then
  2. Press the Undelete link at the top or bottom left of the page.


If you are using a Trash folder, you can undelete the messages by moving them out of the Trash folder into another folder. You can undelete messages any time up until you click on the Empty Trash or Purge Deleted buttons, or until any automated emptying of the Trash folder occurs if you have set up such an option.

Displaying virtual folders

Horde IMP comes with virtual folders feature which helps to differentiate emails easily.

A Virtual Inbox folder is a logical grouping of all mail messages in all polled folders that are marked as unread. Opening the Virtual Inbox folder will present a listing of all such mail messages. This provides a way to quickly read all new (unread) messages which may be spread across many folders.

  1. Go to Options
  2. Click on Server and Folder Information
  3. Check Display Virtual Inbox Folder
  4. Save Changes


A Virtual Trash folder is a logical hiding of all mail messages which are marked with the Delete flag across all folders. A server would normally mark a message as deleted but not move it anywhere or actually delete it, and it would still show up in the folder listing where it resided even though it was marked for deletion. With a virtual trash folder, the email messages marked for delete would no longer show up in the folders they reside in (though there would actually still be in those folders), but they would appear in a Trash folder (the Virtual Trash). This satisfies some people's expectations (visually), as it in essence duplicates the metaphors typical of a POP3 retrieval of email in a typical mail client. To use the folder:

  1. Go to Options
  2. Click on Server and Folder Information
  3. Choose Use Virtual Trash Folder from a drop-down list
  4. Click on Save Changes


You can open the Virtual Trash folder to see all your deleted mail. Messages stay in the folders they were originally filed or placed in, instead of being copied to an actual Trash folder or being shown as marked as deleted in their original folders.

Using address book

Once you have created a contact (Organizing > Address Book > New Contact), there are two ways to look up and insert email addresses when composing an email message: click the Address Book link and pick up a desired contact form the list or

  1. Start typing in the first few characters of the email address or contact name,
  2. Click on the suggested contact from a drop-down list to complete the email address.


Note: Address book in Horde is not connected to your desktop mail client address book in any way. However, you can export your address book from your mail client to Horde IMP, or vice versa, using .csv files. To do that, please navigate to Import/Export section at the top (to access this menu on the top of the page, you should be viewing Inbox folder). To access your Address Book, navigate to Organizing > Address Book.

Creating and applying filters

To create a filter, navigate to Options > Filters > select filters you need to manage. You can manage 3 types of filters: Whitelist, Blacklist and your own filter rules. To edit one of the filters, please click corresponding link.

Creating a rule does not filter any messages. You must click the Apply All Rules button on the Filter Rules page or the Apply Filters icon next to the Inbox name in the mailbox view to filter all undeleted messages according to the specified rules.


You can also create, remove, or arrange the order of rules from the Filters Rules page. Note that rules are applied once per message, hence rule order is significant. Make sure you have the most important rules first. There is no way to import existing rules from other applications.

Creating a signature

To set up your signature, select Options > Personal Information. Next, select the identity you want to change (choose Default unless you have multiple identities). Enter your signature and save options.


All your outgoing mail will now include your personal signature.

Note: Such mailbox settings as auto-reply, mail forwarding, statistics, spam filtering, and resetting mailbox password are available in My Services.