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Mails sent to sister company tagged as spam

12/12/2012, 17h09
In your case I have no idea. The filtering rules will probably not be disclosed by ovh. AFAIK ovh uses techno from another French ISP.


12/12/2012, 13h13
Thank you for the hint.
That's what the header says:

Received: from (HELO queue) (
by with SMTP; 11 Dec 2012 10:40:00 +0200
Received: from (HELO (
by with SMTP; 11 Dec 2012 10:38:17 +0200
Received: from ....[edited: our internal mailservers]...

Subject: [SPAM] Migration Environement Citrix
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary="=__PartF4C56FFA.0__="
X-Ovh-Tracer-Id: [.....]
X-Ovh-Remote: (
X-Ovh-Local: (
X-OVH-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrfeehiedrtdejucetufdote ggodetrfcurfhrohhfihhlvgemucfqggfjnecuuegrihhlohhu themuceftddtnecuufhorhhtvgguuchrvggtihhpshculdeltd dmnegopfhokfffucdluddtmdenucfhrhhomhepfdffrghnihgv lhcuvehorhgsvghllhhinhhifdcuoeffrghnihgvlhdrvehorh gsvghllhhinhhiseifrghnughflhhuhhdrtghomheqnecuffho mhgrihhnpeifrghnughflhhuhhdrtghomhenucfjughrpefoff fhvffugggtsehmtddtreertdej
X-Spam-Tag: YES (ovhvrmailscanner[100])

It seems to me, servers clearly recognize the senders IP and name (our provider's smarthost).
Not all mails are tagged, this one was sent to 5 people @our sister company with a PDF attached. Pure text to a single recipient seems to be less of a problem.

11/12/2012, 17h21
One should better have a sample of the e-mails tagged as spam in order to make a better diagnostic.

Usually this happens because the sending e-mail server (the one that talks SMTP with OVH e-mail server) lacks a correct DNS definition.

The sending host e.g. should have a corresponding name. That is called a PTR record. The resulting name would be something like: . Then if you look the IP address (A record) for the host with the name, the correct answer is

IMO this criterion is not sufficient and leads to many many false positives and also many many false negatives.


11/12/2012, 13h53
In random intervals mails sent from the motherhouse (***.com) to our french sister company (***.fr) are tagged as spam (X-Spam-Tag: YES (ovhvrmailscanner[100]).

On your side we use a internal mailserver and an external smarthost ( and And our mail client is GroupWise 8.02. It happens with normal UTF-8 text mails or with attachements.

Can somenoe explain the OVH filter rules or criteria?

Thank you