Check out the great article on WPExplorer How to Publish WordPress Blog Posts via Email.

Fix attachment renaming bug Test with WordPress 3.9.2

Remove PEAR/PEAR5 dependency which was causing errors on some systems Call wp_handle_upload_prefilter before adding images to WP Temporary new post is now draft status.

Fix missing attachments for html messages

Fixed spelling errors Added more debugging around image sizes Clarified some image options on settings page Removed call to wp_set_post_terms()

Added logic to prevent appending images when preferred text type is HTML. Improved help text on several options and clarified options. Additional logging around attachment uploading

Updated image preview to recognize all variables. Updated “wordpress_default” images template to match WP 3.8. Clarified logging messages for IMAP/IMAP-SSL/POP3-SSL Removed POSTTITLE from templates since we don’t know the actual title at template time. Verified WordPress 3.9 compatibility

Reverted text encoding change in 1.5.17.

Fixed date calculation in test screen. Fixed text encoding issues for systems with PHP 5.4 Updated CSS to better match WordPress 3.8 styles. Removed reference to pluggable.php to allow other plugins to plug these functions. Verified compatibility with WP 3.8

This filter is called when Postie extracts the “from” email address. For example you could use this function to create a WordPress user for this email if it came from your domain. At the point the filter is called there…