I am using sendmail. In the genericstable file I have set emails for local users. When I send mail, the sender is correct, but, under www-data, it is in the www-data <address> format. Why is the user name added only for this particular user? How can I remove it with configuration settings to correct the problem?

is there a way to create automatic mails for Birthdays per Sheets and Scripts? So far, i got it to trigger with a button but now i would love to automate it. birthdate, mail and name are always listed on sheets and should trigger when the date is today, no matter the year (dd.mm). I will post my code below: