Hi, SkrOYC,Tks a lot for your answer. I have learned a lot from your various posts on various topics related to the appsheet community.Best regards.Aruanan Avelino.

Hy, SkrOYC,I believe I managed to adjust the expression so that it performs all the necessary validations.Look:AND(ANY(EXTRACTEMAILS([_THIS]))=[_THIS],LEN([_THIS])<51, FIND(LOWER([_THIS]),[_THIS])=1,LEN(INDEX(SPLIT(INDEX(SPLIT([_THIS],"@"),2),"."),CO...

Hello SkyrOCK.Thank you very much for your teachings.Using your last example, can you help me by showing me how I can limit the size of the email entered to 50 characters, all lowercase and, in addition, testing whether the email is already registere...