MJC said:
Well I looked through their website but why would I be block by them?
Who are
they? Thay are blocking my corporate email?!?!? How/ Why? What can I
do?
Spamhaus, SpamCop, CBL, and the rest of the blacklists are just that:
lists. They don't block anything. They list spam sources according to
their criteria to detect spam (and different blacklists use different
criteria). It is the recipient that blocked your mails. The recipient
chose to eliminate some of the spam flood targeting their customers so
one solution of many is to use the blacklists to detect mails
originating from known spam sources. The blacklist providers don't do
any blocking. The recipient using those blacklists (and other anti-spam
measures) is doing the blocking. You'll have to contact the recipient's
mail provider to ask them why they blocked your mails, or contact the
blacklist author to ask why you are listed.
If you inherited a spammer's old IP address because your IP lease
expired (and you got the spammer's IP address), it can take awhile to
get off the spam blacklists. Spamcop updates frequently and is dynamic
enough that spam sources that discontinue being spam sources will get
dropped after a few days. Spamhaus is similar. However, if the spam
source continue to spam then the expiration of their record may take
longer and may be non-linear (the longer you spam, the expiration gets
longer but can increase at a rate longer than how long you spam). When
my IP lease expired, I got stuck with one that was blacklisted on the
SORBS list. I contacted the SORBS admin, explained to them what
happened, and they updated their list in 2 days. Although that sounds
great, not all blacklist authors are as responsive and SORBS isn't
really as great as I am making them sound as their records was over 4
months old on my "new" IP address (i.e., they don't update their
database very often which means lots of IP addresses are no longer spam
sources and may have been reallocated to a different user).
