Make time aligned tracks or stems.
Include all FX.
Do not normalize when bouncing.

Use a lossless file format (e.g. WAV) and full bit depth.
Send your rough mix.
Send up to 3 reference tracks.

Put all audio files in a folder „audio“.
Put additional files in a folder „info“.
Put both folders in a project folder.
Pack project folder as archive (e.g. ZIP).

Name all files and folders like this:
„artist_project_title“
No spaces, punctuation, special characters.
All names are work names.
Publication naming may differ.

Send project archive file via WeTransfer to
leon@lmsr.online

20230128 TG