Monthly Archives: November 2015

Better e-mail quality by using SPF

/ Common

What can you do to prevent other people from sending spam e-mails using your e-mail address as sender address?

sender_address_sampleThe answer is: Nothing, regrettably. In the same way as you cannot prevent other people writing your address onto a paper envelope and post the letter.

But: You can do something in order to help recipients to reject mails, which were not really sent by you! One useful method if SPF (Sender policy framework). Summarized SPF works like this: You add some information to your domain defining which mail servers you want to authorize as legal sources for your e-mails. The recipient can evaluate this information and reject e-mails or mark them as spam, which have your sender address but were not sent from mail servers authorized by you.

Well, the recipient may use this information, he is not obliged to do so. But an increasing number of recipients use this method and reject e-mails, which were sent from other mail servers than those authorized by you.

How to enter SPF information for your domain? Very simple:

  1. Log in at www.delink.biz using your customer login data
  2. Go to DOMAINS -> Manage and click the DNS button next to your domain
  3. Enter the following data at Add new subdomain/service

Subdomain/Service: – leave this field empty –
Type: Select TXT
TTL: – leave this field empty –
Target: v=spf1 include:spf.delink.de -allspf_enter_en

To finish click Add and then Save changes. Approximately 10 minutes later the SPF record for your domain will become public, and the method starts to work.

Please note!

The above entry is correct in case you are sending e-mails with your domain as sender address solely via the deLink mail system. If you are sending e-mails via other systems as well (e.g. a local mail server, via a newsletter provider) you have to add these mail servers to the SPF record.

Malicious phishing mails on the way

/ Common, Domains @en

caution_phishing

Currently many domain owners are receiving faked e-mails informing about an alleged suspension of their domain. These mails are looking authentic, because

  • as sender deLink or another, really existing registrars is indicated
  • the e-mail adress of the recipient is correct
  • the personal name is correct
  • the domain really belongs to the recipient

Obviously the data was grabbed from the public domain whois. The content of the e-mail is similar to this:

Dear John Doe,

The Domain Name yourdomain.com have been suspended for violation of the deLink GmbH Abuse Policy.

Multiple warnings were sent by deLink GmbH Spam and Abuse Department to give you an opportunity to address the complaints we have received.

We did not receive a reply from you to these email warnings so we then attempted to contact you via telephone.

We had no choice but to suspend your domain name when you did not respond to our attempts to contact you.

Click here and download a copy of complaints we have received.

These e-mails are FAKED.

If you click the proposed link, you will very probably get a trojan onto your device. In case of doubt please forward the e-mail to us, we will analyze it and give you a feedback.