How? Your host uses PHost under UNIX and my scripts :-)
But what do you do? Just send mail with your turn or result-request
which can be identified as such. This is done with the subject of the
mail. To send in your turn, encode it in some way (uuencode, MIME, base64,
binhex) and send it to your host with the subject:
trn gamename
where the gamename is the name your host gave you once. To get your result
once more, send a mail with the subject:
rst gamename [racenumber]
where the racenumber is optional (useful if you play more then one race but
need only one result). It might be the case your host gave you other words than
trn and rst, then you use those other words.
What is the response? In the case of requesting a result the response is simply the requested result or a mail denying you access. In the case of a submitted turn, the response is a mail describing what happened with you turn. In the ultimate case it has been saved as valid turn and you receive a message mentioning that, including the log made by the checking program (phost, usually). In every other case, the word ERROR appears in the subject and your turn was not saved as valid turn (your host does still have a copy of it in his mail, but it will not be used when the game is hosted).
You can either try to solve the problem by submitting another turn without the problem mentioned in the log that was sent to you, or wait for your host to repair the problem (if you are convinced the problem was not caused by you; your host received the same error-message as you did, so he/she will at least notice the problem). Sending in a valid turn will always replace any turn saved before.