In Horde web e-mail application, by default, e-mail attachments are not saved along with the e-mail in the sent mail folder. In order to save attachments with your e-mail:

• in the compose window, click the arrow next tothe Add Attachment sign and select "Save Attachments in Sent Mailbox". This setting will save the attachments, only for the current e-mail.

• to enable saving attachments for all e-mails

after logging in, click the cog in the menu, Preferences --> Mail --> Sent Mail --> and select "Save Attachments" in "Save attachments in the sent-mail message?" box. Now, e-mail attachments in your future e-mails will be saved with the e-mail message.