Anti-Spam Protection

Every IP available with our  products and services, as an  service provider, our data centre  will register and reserve it with organisations such as RIPE or ARIN. This means that we appear as the IP abuse contact for litigation in the WHOIS database.
If an IP is reported to organisations such as Spamhaus and SpamCop?, which work to combat spam, malicious websites and phishing, then the reputation of the entire OVH network is at stake.

It is therefore important that it  takes care of the reputation,

How does the protection system work

The system is based on the Vade Retro anti-spam technology

What to do after receiving an email alert

mportant steps to take on receiving a block alert BEFORE the affected IP can be unblocked.

  • stop sending email (e.g. stop all mail software such as qmail, Postfix, Sendmail etc.)
  • check the email queue (e.g. qmHandle for qmail, postqueue -p for Postfix)
  • analyse your logs using the Message-ID found in the block alert

If you have checked and found that Message-ID are from your legitimate email, you should then ensure that your email messages comply with the RFCand the Best Practices indicated below. If they do comply, you can inform us by sending a sample of your email (including header). Our technical support contact with our data centre

RFC and Best Practices

RFCs (Request For Comments) are documents intended to describe technical aspects of the internet. They are produced and published by the IETF (Internet Engineering Task Force), a group which basically produces and defines standards.
For more information, see: RFCIETF and Internet Draft

Volume emails

If your outgoing email volume is very high, you are advised to:

  • reserve an IP block dedicated solely to email usage
  • provide an ‘abuse’ address on this block in order to receive complaints
  • configure reverses on all IPs correctly

This operation will enable you to simultaneously isolate the IP and domain reputation if you send emails for various domains, to receive the complaints, and thus do what is necessary to get unblocked by various organisations. It also enables you to locate a problem more quickly on a form that uses domain X or Y, as the emails are not sent out from the same IP and don’t have the Key same reverse.

Key words to avoid

Avoid using spammer keywords in your emails such as “buy” and “last chance”, and avoid capital letters, impersonal subjects, exclamation marks, and % discounts.
Don’t forgot to provide an unsubscribe link for people who have not requested to receive your email or who believe it to be illegitimate.
Be particularly careful to ensure that your emails contain the sender’s address (or an alias), a subject, and a correct ratio of text, images and links in the body of the message.
The text vs. image and text vs. link ratio must be high. Don’t overload the email with hypertext links and avoid Javascript.

Some authentication services enable you to protect your reputation.

  • Sender-ID
  • An email authentication technology developed by Microsoft which validates the authenticity of your domain name by verifying the IP address of the sender. This technology is based on the IETF standard: RFC4406

  • SPF
  • Sender Policy Framework is a standard for verififying the domain of the sender. It is based on RFC4408 and consists of adding an SPF or TXT field to the domain DNS, which contains the list of IPs authorised to send emails from this domain.

  • Reverse DNS
  • Reverse enables your IP to be “translated” into your domain. That allows the domain associated with the IP address to be found.

  • DKIM
  • DKIM This standard is described in RFC4871.
    AOL, Google (Gmail) work on this basis. Official website: DKIM

Best practices are recommended methods which are often based on these documents and are intended to advise you on the best way to proceed. In this instance, this means the basic rules to follow so that your emails are not marked as spam.

Unblock  IP Reqution

Do not ask the IP under any circumstances without having suspended the sending of emails from your server, otherwise you will immediately get blocked for a second time (and a longer duration).

Contact us through  your client account