PHP Email Message Class for Extracting Attachments
Thanks to Chris Hope for making his PHP email message class for extracting attachments available to everyone. Kartero is now using a modified version of this class for improved handling of attachments.
Thanks to Phoenix Antonio for pointing out regex modifications in extract_emails_from() to support addresses from social network notification messages and for catching Kartero's failure to auto-create Sieve filter user directories under $mail_home.
Thanks to Grant Skinner for creating RegExr, an online regular expression tester with syntax highlighting, contextual help, video tutorial, reference, and searchable community patterns. Kartero's kartero_smime_sign() function was improved using this very helpful tool.