'x' mailing list is not a valid e-mail address because it is not of the form user@host. You must correct it before sending the e-mail.
I have created a mailing list; when I am trying to send an outgoing message to this list I am receiving this notification: 'x' list is not a valid e-mail address because it is not of the form user@host. You must correct it before sending the e-mail.
Alla svar (1)
If the 'mailing list' consists of more than one word with a space in between words, replace the space between the words with an underscore _.