/usr/share/applications/neomutt.desktop is in neomutt 20171215+dfsg.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | [Desktop Entry]
Categories=Office;Network;Email;
Comment=Simple text-based Mail User Agent
Comment[de]=Einfaches, Text-basiertes Mailprogramm
Exec=neomutt %u
Icon=neomutt
Name=neomutt
Name[de]=Mutt
MimeType=x-scheme-handler/mailto;
NoDisplay=false
Terminal=true
Type=Application
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