Two lines is enough.
You do not have to explain the situation properly, or make it sound reasonable, or know what you are asking for. That is what the first conversation is for.
Sent
That reached me.
I answer everything myself, usually within a day. If you do not hear back, email me directly at craig@craigfearn.com, because that means something failed rather than that I ignored you.
Not sent
Something went wrong at my end. Please email craig@craigfearn.com directly and it will reach me.