Send SMTP Mail Message: An invalid character was found in the mail header:"@"

I already checked it and I can’t find any mistake…how to fix it …Can somone help me please :sob:

I got the same problem. :frowning:
@yahmpt have you fixed the problem?

this error is getting because of in mail id u r using like this or some any invalid character I also getting same issues but U need to correct it.