Impressionwise Email Verification and Spam Trap Removal

Threat Intelligence Center


Blacklist Profiles\The Spam and Open Relay Blocking System (SORBS)

The SORBS (Spam and Open Relay Blocking System) provides free access to its DNS-based Block List (DNSBL) to effectively block email from more than 12 million host servers known to disseminate spam, phishing attacks and other forms of malicious email. The list typically includes email servers suspected of sending or relaying spam, servers that have been hacked and hijacked, and those with Trojan infestations.

http://www.sorbs.net/

Blacklist Zone(s)

spam.dnsbl.sorbs.net
recent.spam.dnsbl.sorbs.net
rhsbl.sorbs.net

Blacklist type

URIBL: A URI dnsbl is simply an anti-spam “black list” delivered via DNS which consists of domain names and IP addresses which are found in the body of the message. Specifically, there are the domains and IP addresses which spammers use to host their web sites.

RBL: A RBL dnsbl is simply an anti-spam “black list” delivered via DNS which consists of IP addresses which are found in the body of the message. Specifically, there are the domains and IP addresses which spammers use to host their web sites.

Threat level/ delivery impact

Brand/ Network Resource/ Deliverability Harm - If your firm is impacted by threats shown below, you need to take immediate action as a laundry list of negative outcomes have potentially already begun ranging from significant deliverability issues to service termination from your ESP or ISP. If ignored, your brand reputation could be permanently tarnished and easily become associated in some circles with known spam organizations such as SpamHaus’s ROKSO or other similar blacklists.

Network Resource/ Deliverability Impact - Below are threats that could cause some significant delivery and reputational issues. At worst, you will experience continued delivery impacts and may be forced to purchase new sending domain and IP resources in order to achieve optimal deliverability.

Impacted Delivery - The following threats will result in temporal delivery issues, diminishing your campaign's outreach and effectiveness. Prolonged sending of these threats may result in longer lasting temporary blocks leading to eventual permanent blocking of your emails. There is minimal overall brand and sending resource reputational harm from these items

Nomination

Listing is manual and is performed when any spam is received at a SORBS spamtrap. SORBS spamtraps include, but are not limited to, the private email addresses of the SORBS administrators. On occasion, when a particular network is seen to be spamming and the listing of a single IP address seems to have no effect, increasingly larger sections of the Netblock will be listed. If spamming continues, the size of the listing will be slowly expanded (depending on the number of spams received) until something is done about the spammer.

Listing lifetime

Not published.

Notes

Delisting guidance

De-listing is relatively easy. You log in to the SORBS Support System at http://www.sorbs.net/cgi-bin/support and answer the questions truthfully and honestly. If you are within the thresholds and limits you will be presented with a 'Delist Me' button which you may use to "Self-Delist" the listing.

About Impressionwise

Impressionwise is a firm that provides professional real-time email verification, validation, and list cleaning services. Our core belief is that in order to have a successful email campaign, a company must send only a clean, well maintained email list. Our cleansing methodology is focused on the health of your sending network resources. The cleaner the domain and IP the better the delivery. Specifically helping email marketers validate and remove threat based email elements such as spam traps to ensure you are maximizing your lists' potential resulting in a higher level of engagement with your recipients. Our services allow you eliminate hard bounces and thus avoid being banned by your email service provider. Having been around for the past decade, Impressionwise’s longevity and industry experience have allowed us to amass the industry’s largest set of email list cleaning resources with the most flexible service options resulting in the highest level of actionable insight.


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Impressionwise makes it easy for potential clients to evaluate our list cleaning services by offering a complimentary scan and report for a sample set of your data to illustrate the benefits of our services.

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