added field for received time in mail window, added value for received time & receiving mail in Mail.cs & added sort function for the mail
made a "SendMail" method (works)
added importance column in sqlite database, added "important mails" tab, showing only important mails there, added stupid prototype filter to remove mails that the user sent from mailoverview (it checks the "From.Address" property if it matches the logged in address, there must be a better way), changed SendMail method to only send important mails, added "Importance" property in mail class
added spam filter
attempted to add sent mails to database, was stopped by avast...dafuq?
added support for sending attachments & zipping attachments & saving attachments on new mails in "projectroot/Attachments/message id/", zipped attachments are temporarily saved in "projectroot/Zipped/", included nuget package "DotNetZip"