Version: unspecified (using KDE 4.7.2) OS: Linux In kmail2, when you open adressbook you can select only 1 recipient. More than 1 recipient isn't accepted by kmail2. So if you when to sent a mail to 20 different recipients, you have to open 20 times adressbook for selecting one by one your 20 recipients ! Reproducible: Always Steps to Reproduce: click on new message click "select" for the field "To" select two or more contact in the adress book "click add as To" Actual Results: Kmail open a dialog : "You selected 2 recipients. The maximum supported number of recipients is 1. Please adapt the selection". Expected Results: add all the selected contacts in the field "To" (or Cc or Bcc)
I don't know why but you changed your "MaximumRecipients" in config file. By default we can add 200 recipients and it works fine here.