Very! Those you communicate with will be looking at your e-mail in its entirety to determine your overall meaning and intent.
For example, if you send a rude e-mail and sign-off with “Have a nice day!” then it is clear that you intended to be sarcastic and the recipient will learn a bit about the type of person you are. If you need someone’s help and you sign-off “Thank you in advance for all your help!” your chances of getting the help you want are better than if you left that little sentence off.
Your sign-off can confirm, instill and portray the overall demeanor behind your message. To be efficient and save time, I have my sign offs included in the automatic signature file appended to the end of my e-mails.
Most folks stick with the standards followed by their first name:
But your sign-off need not be standard! Nor does your sign-off have to be a word or phrase above your name to add to your e-mail’s overall tone and intent.
HTH! (Hope this helps!)
Have a great day!
Thank you so much!
Talk to you soon! (TTYS)
Your sign-off gives you the opportunity to make sure that the sentiment of your e-mail is clear and not open to interpretation or the recipient’s speculation. Especially when making requests or in need of the other side’s help, a nice sign-off can enhance the potential of you receiving the type of response you desire.