Thank you for your revert dwb; but to be honest, I cannot paste table in the mail - may it be created in excel or notes or any other format.
What I found out is, if I create the table in excel - go to print option - select the table and then click on email the selection option. the table gets pasted in the mail in PDF format. you can make the size as required using mark up.
Of course with this technique you need to write only new mail - cannot be applied to replies of filaments!!
Apple must take into this issue, we need to create table while writing the mail and not want to send it as separate attachment - added work, time and energy!!