Send a message to your @inbound.wxtx.info address. You'll find this at the top of your account page.
The message should look like this, as an example requesting a GFS model grib:
GFS:40s,60s,60w,80w
Do not use a hashtag (#) prefix. Do not use "send" as a prefix.
Use the exact format from Saildocs. Currently we only support GFS and ECMF models. See Saildocs instructions for specifications.
An encoded file will be sent in multiple messages. Use the app to decode the messages back into a .grb file.