Since your email
is not personally addressed to each and every recipient, a mail server that
received such email may automatically filter and identify it as SPAM, delete
it, and/or may blacklist the sender email domain.
The reason are that, to the sender, sending 100
emails using the BCC: field gives the impression
that he or she is sending only one message by BCC: to a 100 others.
But the effect
for the mail server, is actually equivalent to 100 different
email messages sent to 100 different email addresses--because the mail server
have to make a 100 duplicate copies of the message before they can be delivered
out, to each of the 100 BCC: recipients.
Some ISPs do not mind if you send about 50 BCC messages on a daily
basis -- policy may differ from one ISP to another, therefore it is better to
check it-out before your account get terminated.
When too many
account holders are
sending emails using BCC: the ultimate effect is total congestion at
the mail server and therefore, degrading its performance--Meaning that you are
using their (ISPs) resources and ISPs administrator view it with disdain, hence,
account holders using BCC: to send large quantities of emails will have
their account terminated (that's how spammers make used of open relay servers
relays easily detected by ISP mail serves filtering the
field, which is the most favored
method used by spammers to send hundreds (millions) of thousands emails with
just one email message--otherwise they will have to send each email one by one,
addressing each recipient by the To: field and having to maintain their
own expensive high speed mail servers--which would limit their spamming
SMTP Relay Check tool
SMTP mail server--although, an insecure (open
relay) mail server may not be what it seems to be--because mails accept may in actual fact
were dumped (deleted). And the only way
to be sure that the mail server is an open relay, is to send (relay) an email back to yourself.
SMTP Relay Checker probe tools--(available from
an intruder alarm and will alert the system administrator of a hacker
probing--which is illegal--your IP address, date
and time of probe will be automatically record and you can be subjected to law suits.
new web-based forum for getting help is
available at http://forum.spamcop.net