This is a list of mail provider settings that you might find useful when you create your mailing list.   Mail Provider Settings Hoster Host / Server Login / User Port Protocol Security Authentication Notes 1&1 – EN Inbox imap.1and1.com login@domain.tld 993 IMAP SSL No Sender smtp.1and1.com login@domain.tld 25 or 587 SMTP None / SSL … Continue reading Mail Provider Settings