Today I mailed notes to one of my classmates. Under the subject I typed " Reply immediately after receiving". But the thing is, I am a bit skeptical about the grammar of the sentence which I always am when it comes to using English either in speaking or writing. But this time I am asking you native speakers of English.
Would you have said it differently? and my second question is can I reword the sentence in the following way:
Replay as soon as you receive .. Or
Reply just as you receive.
Thanks in advance.