Many thanks for this wonderful tool to make the mail system safer!

It would be nice to include the icons for LMU Munich (Ludwig-Maximilians-Universität München) and some of its institutes:

lmu.de -> https://www.ifi.lmu.de/favicon.ico
ifi.lmu.de -> https://www.ifi.lmu.de/favicon.ico
sosy.ifi.lmu.de -> https://www.ifi.lmu.de/favicon.ico
sosy-lab.org -> https://www.sosy-lab.org/favicon.ico