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Hi, as shown in the log we have a Postfix 2.9.4 with a localhost-connect from Amavis on Port 10025 that uses the xforward-command to give us the source IP address from the real client: Apr 28 16:04:19 host postfix/smtpd[31803]: connect from localhost[127.0.0.1] [...] Apr 28 16:04:19 host postfix/smtpd[31803]: < localhost[127.0.0.1]: XFORWARD ADDR=10.90.x.x PORT=56465 PROTO=ESMTP HELO=host.business.example.com SOURCE=REMOTE Apr 28 16:04:19 host postfix/smtpd[31803]: > localhost[127.0.0.1]: 250 2.0.0 Ok But in the smtpd_recipient_restrictions Postfix makes lookups just for the localhost source IP 127.0.0.1: Apr 28 16:04:19 host postfix/smtpd[31803]: >>> START Recipient address RESTRICTIONS <<< Apr 28 16:04:19 host postfix/smtpd[31803]: generic_checks: name=check_client_access Apr 28 16:04:19 host postfix/smtpd[31803]: check_namadr_access: name localhost addr 127.0.0.1 Apr 28 16:04:19 host postfix/smtpd[31803]: check_domain_access: localhost Apr 28 16:04:19 host postfix/smtpd[31803]: check_addr_access: 127.0.0.1 Apr 28 16:04:19 host postfix/smtpd[31803]: generic_checks: name=check_client_access status=0 I would have expected to see Postfix also (or instead?) making lookups for the 10.90.x.x, which is included in the client_access_map and should match here. We have to trigger a REDIRECT-action in the client_access_map, which is not possible before a smtpd_proxy_filter, so having a lookup for the real client IP on Port 10025 is important for us. Peer - -- Heinlein Support GmbH Schwedter Str. 8/9b, 10119 Berlin http://www.heinlein-support.de Tel: 030 / 405051-42 Fax: 030 / 405051-19 Zwangsangaben lt. §35a GmbHG: HRB 93818 B / Amtsgericht Berlin-Charlottenburg, Geschäftsführer: Peer Heinlein -- Sitz: Berlin -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTZqEHAAoJEAOLLpq5E82HD5EIAMCA5BxN8MlzUTBpXgo06wqF LmQBh9hoJHNI6+n3sjLagZZs6fmW0/mbO2Xc+wYc71pIYPcP+4Pfwmfxj6pEOnGK RrkiDbC3RlXCxn05kj1V6tCED2JtCWXIf6ak7nMm28sODHfOZE2pfndly7bC/pnC Ld0/fRQA8/GPsezx1RvhWoDxflrWNpOA4zZMQdkoPbjRf8+NvdmET7iSxxrx+Dz1 iXHaljzNEJLW2AOjiFZJvzjOPL6rVuuLevFRjNg0vhnX80LRsnYTx/F/ScN0flbP uTMyZ4VYed0lbClBdhmqeITb73/wH9pzSXFRWTDSgu5x9tNmjQyzk1APnbIGwZc= =4E9Q -----END PGP SIGNATURE-----