Any Idea why am i getting this error?


Hi @shubham_dubey !
Maybe item.Subject has a problem (like illegal character like / or \ or whatever).
Did it work with some attachments, or is it blocking for all the attachments ?
Can you use writeline activity before save mail message, to see what is in item.Subject ?
Or put a breakpoint before save mail message and show us your local panel (on the left) to see what is given to item.Subject