Let op: deze informatie is uitsluitend in het Engels beschikbaar en bedoelt voor server administrators welke hinder ondervinden bij het afleveren van e-mail naar onze servers. Vanwege het internationale karakter van e-mail en de over het algemeen Engelse voertaal bij technische vraagstukken is er voor gekozen om ook deze informatie in het Engels beschikbaar te stellen. Bij vragen kunt u contact met ons opnemen.
Ook Sensson maakt gebruik van RBL’s. Om te controleren of uw verzendende e-mail server op een RBL terecht is gekomen kunt u gebruik maken van onze Multi RBL check. Deze lijsten zijn niet in beheer bij Sensson. Staat u op een van deze lijsten? Bezoek dan de website van de RBL voor meer informatie.
This document resolves several questions asked about our mail policy. This policy applies to all mailservers located in our network, either owned, shared or business mail.
If you have any questions regarding our policies, feel free to contact us directly.
Open relay can be the cause of a variety of spam and unsolicited mail problems. Therefore we do not accept any form of open relay on any of our hosted services or servers. Please contact us immediately if you are uncertain about a mailserver hosted in our network.
If your server is receiving notifications while connecting to our mail cluster or shared mailservers being similar to:
550 – Relay not permitted for domain
Please read http://services.sensson.net/antispam/
It is very likely that your sending mailserver is configured incorrectly. Please notify your system administrator to resolve this. If you believe this is a problem on our end, please contact our servicedesk and include the full headers of the bounced e-mail message. This will help us to determine where it exactly went wrong.
More and more businesses are facing costly encounters with e-mail viruses, worms or trojan horses on a daily basis. The costs associated with computer viruses and malicious code can be enourmous. To help you protect aginst these infections, we introduced anti-virus technology powered by Clam Antivirus. This technology will protect businesses from e-mail virusses and thus save them money.
We update our database on an hourly basis to enforce the latest technology against these threaths. Viruses are not tolerated and will therefor be rejected by our servers. The sender will be notified of this event.
There has been an exponential increase in spam on the Internet in the recent past and many domains have had to put measures into place to keep the excessive spam from flooding users’ email boxes.
Sensson utilizes an advanced system to prevent this from happening. Unfortunately, spam is not an exact science and we may have accidentally blocked your e-mail even though you’re not sending spam.
If you’re not using your ISP’s e-mail server to send your e-mail then switching to that server is generally the best way to send e-mail. Many ISP’s block their customers’ ability to send e-mail from their own computer or through other e-mail servers besides those the ISP supplies for that purpose.
Please contact us to request the white listing of your server.
How it works
Sensson uses several third-party blocklists to keep spam from reaching users’ mailboxes. Depending on the blocklist that blocked your email there are several steps you may wish to take to see why your email was blocked.
(It may not be your IP that is blocked, but the IP that your ISP uses to send email, or the IP may be an open relay.)
Other blocks are put in place due to the number of open relays on DSL networks. If your domain name resolves to a DSL or ADSL domain or is a known dynamic block of IP addresses used by ISPs that should not be hosting a mail server (for example, dsl-verizon.net or *.da.uu.net) you should probably send email through your ISP’s SMTP server instead of directly from your own home mail server. Or, contact your ISP about setting up proper reverse DNS so that your IP does not resolve to a DSL or dialup domain name.