where: ISPconfig 3 - webmaster@localhost.tld

[edge]

Where can I change the e-mail address that is used for the "Welcome to your new email account.".
At the moment it's send by webmaster@localhost.tld

[till]

The email address is currently defined in the language file. The file is /usr/local/ispconfig/interface/web/mail/lib/lang/en_mail_user.lng or the corresponding file in the language you use. You may also use the language editor to edit this file.