Hello, I have a (test) ISPConfig server on a VPS. I am trying to forward incoming mail to my private email address, but I constantly get the (Postfix) warning: Code: Nov 22 09:32:26 s1 postfix/smtp[6676]: C4F746600DD: host vps.transip.email[149.210.149.126] said: 421 4.7.0 No valid 'x-transip-mail-auth' DNS record found for '<DOMAIN WHICH SENT MAIL>'. Please see https://www.transip.eu/question/110000764 for more information. (3tNJcW6yVYz1xmw) (in reply to end of DATA command) Nov 22 09:32:28 s1 postfix/smtp[6676]: C4F746600DD: to=<MY PRIVATE MAIL ADDRESS>, relay=vps.transip.email[2a01:7c8:7c8::126]:587, delay=3.7, delays=0.01/0.03/2.6/1.1, dsn=4.7.0, status=deferred (host vps.transip.email[2a01:7c8:7c8::126] said: 421 4.7.0 No valid 'x-transip-mail-auth' DNS record found for '<DOMAIN WHICH SENT MAIL>'. Please see https://www.transip.eu/question/110000764 for more information. (3tNJcY6pvXz1Q6Zt) (in reply to end of DATA command)) The methodes which I tested, are: Created an email mailbox "test@<DOMAIN NAME>" and filled in my private email at the "send copy to" field. Deleted the above test mailbox and created a Mail Forward to my private address, with and without the option "Send as" checked. Above methods constant get the same error message. I am relaying my mail via my hosting provider TransIP, they have a VPS Mailservice. In my DNS I configured the following options: A record for (mail-) server itself. DKIM x-transip-mail-auth with a key within the text-field (this one triggers the message) What I simply want is, when someone (external domain) sends an email to my domain, it has to be forwarded to my private email address. I understand that sending domains can't be forwarded by my server / domain due to security reasons, but I thought that the send as option should eliminate this. The mail is than be rewritten to my destination domain (/mailbox) as sender? Does anyone have more information over this subject or a solution to this problem ? EDIT: apparently I need "SRS (Sender Rewriting Scheme)" for this problem
