I think it means "No Reply Neccesary".
Not Right Now
Not right now.
NRN was created on 1965-01-23.
What does a 3 at end of email mean
End of Message
Australia
United Kingdom
very Respectfully
At the end of the adress it means Poland.
The airport code for Weeze Airport is NRN.
"SF" at the end of an email typically stands for "Sincerely" or "Sincerely yours." It is a common way to sign off formal or professional emails.
TTYL means Talk To You Later.