It could mean who it is is shy if your friends its just friendly if you have been flirting then is shyness.
it means to simply be careful and take care of yourself. the person sending the email is just showing that they care.
your husband writes "take care" because he loves you and it means that he wants you to take care of yourself and not to get hurt. (physically and emotionally)
What does a 3 at end of email mean
Just that - take care of yourself, get home safely, be careful, don't meet with an accident etc. She cares about you and saying take care expresses that care
Australia
End of Message
United Kingdom
I think it means "No Reply Neccesary".
At the end of the adress it means Poland.
very Respectfully
"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.
It's means hit me up...hum
TTYL means Talk To You Later.