User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de-AT; rv:1.8.0.7) Gecko/20060910 SeaMonkey/1.0.5 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; de-AT; rv:1.8.0.7) Gecko/20060910 SeaMonkey/1.0.5 SeaMonkey can save a single message to a .mlf-file. Double-Klicking this mlf.file from Windows-explorer opens this file in Outlook. Please extent the commandline-mode like this: SeaMonkey -mail "openfile='%1'" SeaMonkey should do than like "open file" from Mail-Main-Windows File-Menu. Reproducible: Always Steps to Reproduce: 1. Mail -> open a message 2. Save as file 3. Double click the file from Windows Explorer Actual Results: double-klicking the eml-file opens the message in outlook Expected Results: double-klicking the eml-file should open SeaMonkey "Mail" like SeaMonkey-Mail->File->Open File -> filename.eml