hleatherbury said:
I'd like to send an email invitation out, but don't want to get caught
by
spam filters.
Use Word's MailMerge. Or use some 3rd party bulk mailer that sends out
individual copies of each duplicate message. I've heard of Mailcast but
never used it. Some others are listed at
http://www.slipstick.com/addins/mail.htm#massmail. Be aware that you
might hit anti-spam quotas with your e-mail provider, like how many
messages you can send per day, maximum bandwidth per day (or
cumulatively for the month), or a maximum mail sessions per minute
quota.
Sending out separate mailings still won't get you past many spam
filters, especially if you send most to the same domain. The domain's
mail server will see lots of mails containing the same content addressed
to many different usernames, so it marks it as spam. Trying to hide the
number of recipients hit on a domain with the same message by sending
them separately may not work if the spam filtering checks for that. It
doesn't need to interrogate each message and do any compares. It just
generates a hash code for each mail and then checks how many times that
same hash code is generated within some period of time. Once a spammy
threshold has been hit, all further e-mails that generate the same hash
code (which have the same content) will get filtered out or bounced.
That's why spammers insert their hash-busting strings within each
message they spew to bypass this checking.