Facebook and various other mail servers
26/05/2010 09:10
Ok you all know about spam, and how annoying it is.
Did you know that some of Facebook's mail machines are blacklisted internationally?
What does this mean?
The same parts of our servers that protect you from spam from 99% of spam sites are now blocking you from time to time from common sites that have been black listed.
We block on average 100,000 spam emails per day, per server.
As a test we turned off just one part of the spam protection software and noticed around 10,000 spam messages get through our gateway.
We do not want to accept these spam messages for the good of some mail machines that have been black listed so what we propose is the following:
If you get any of the following symptoms:
- Email not arriving when automatically sent.
- Email not arriving from known contacts.
- Email not arriving from customers.
- Notifications that there was a problem verifying your email address (Facebook)
What to do?
- Notify Direct Support of the email address or domain name to do with the problem.
- Record the time and date but please do this within 7 days as archives can still be accessed for longer periods but costly to do.
We will analyse each problem on a 1 to 1 situation and look for other emails matching similar resemblance to accomodate for similar situations at the time as we investigate.
If you want to check yourself and have a bit of technical knowledge then below are a few of the pages you can use to check:
bl.spamcop.net
dnsbl.sorbs.net
http.dnsbl.sorbs.net
dul.dnsbl.sorbs.net
misc.dnsbl.sorbs.net
smtp.dnsbl.sorbs.net
socks.dnsbl.sorbs.net
spam.dnsbl.sorbs.net
web.dnsbl.sorbs.net
zombie.dnsbl.sorbs.net
pbl.spamhaus.org
sbl.spamhaus.org
xbl.spamhaus.org
zen.spamhaus.org
images.rbl.msrbl.net
phishing.rbl.msrbl.net
combined.rbl.msrbl.net
phishing.rbl.msrbl.net
spam.rbl.msrbl.net
virus.rbl.msrbl.net
rbl.spamlab.com
