SMTP Relay with two mail domains


I had a question about the SMTP Relay on my XG 135 Firewall and it works correctly, now. At least with one mail domain external mail server secured over xg firewall (solved).

I increased the complexity with a second mail domain and get an error.

My General email settings are:

I have two SMTP/SMTPS policies, one for every mail domain. The business one is the same only with their own domain name.

The address group for both domains are the same with the difference of the domain name:

I just show you how i create this for both domains. At least for the privat it's working.



If i send from a third mail account a mail to both mail accounts (privat and business) is on one a crazy mail delivery error.

Both mail accounts are by the same provider, one was successful the other wasn't. I think it is not possible to relay more than one mail domain over the XG Firewall with the newest SFOS V18. The best would be i made a configuration error :). Attached the error message:

This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients.
This is a permanent error. The following address(es) failed: host [] SMTP error from remote mail server after RCPT TO:<>: 550-Sophos Anti Spam Engine has blocked this Email because the sender IP 550 Address is blacklisted.
---------------------------------------------- message/delivery-status ----------------------------------------------
Reporting-MTA: dns; Action: failed Final-Recipient: rfc822;
Status: 5.0.0 Remote-MTA: dns;
Diagnostic-Code: smtp; 550-Sophos Anti Spam Engine has blocked this Email because the sender IP 550 Address is blacklisted.
---------------------------------------------- message/rfc822 ----------------------------------------------
Return-path: <>
Received: from [] (port=60360 by with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from <>) id 1kDy1o-00GlD9-7L for; Fri, 04 Sep 2020 00:48:24 +0200
Received: from ([]:25582) by with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from <>) id 1kDy1h-0001VD-06 for; Fri, 04 Sep 2020 00:48:17 +0200 Date: Thu, 03 Sep 2020 22:47:39 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=protonmail; t=1599173266; bh=uidnY6jlxQy6tKVuIn8VjeA4Ly5IH6SAlBKL20lHlJs=; h=Date:To:From:Reply-To:Subject:From; b=MQTvdoWEu9XB8OgwZZmrQreSFSGoXgRLVJpiFNtG3Fz0ZFzMFzT/Lz86S7bemRIA1 1C6COwj617nUhJATi69w4SB3eugf4LR4VNwyxrElaEKi/WxGuNogQZEm7J66o0dIyM fzXgQGcM6WwZsCTlM6vxyaLs3hjWGRncjyYoELMg= To: "" <> From: Wolfgang <> Reply-To: Wolfgang <> Subject: Test MX 4 Message-ID: <> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="b1_Rt9ltbmJON5cpsiXPpcBQaxEPbLvwAFiT2xYq0eQ" X-Spam-Status: No, score=-1.2 required=10.0 tests=ALL_TRUSTED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,HTML_MESSAGE shortcircuit=no autolearn=disabled version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on X-Sophos-IBS: success X-CTCH-PVer: 0000001 X-CTCH-Spam: Unknown X-CTCH-VOD: Unknown X-CTCH-Flags: 0 X-CTCH-RefID: str=0001.0A09020A.5F5172B1.00B6:SCFSTAT63089915,ss=1,re=-4.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-CTCH-Score: -4.000 X-CTCH-ScoreCust: 0.000 X-CTCH-Rules: X-Sophos-Firewall: smtpd v1.0 This is a multi-part message in MIME format. --b1_Rt9ltbmJON5cpsiXPpcBQaxEPbLvwAFiT2xYq0eQ Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: base64 ……… Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: base64 PGRpdj48YnI+……….--

Hope someone can tell me the problem.



  • My interpretation of the error message is for following part:

    Received: from [] (port=60360 by


    There is a helo according the "Email/General settings" with, it works for the private mail domain but not for business mail domain. I think it should be "".


    In "Email/General settings" is only one domain allowed, as far as I see.


    How can i solve this problem?