No breaks my wooden-shoe (is a saying in the Netherlands) which means, now i go crazy:
I have a google script where "\n" is not working with MailApp.sendEmail. In an other script i used \n too with the MailApp.sendEmail and there it is working! I already tried GmailApp.sendEmail, same problem.
htmlBodyinstead of plain text body parameter. On HTML line breaks are ignored by design. - Henrique G. Abreu