What procedures do you follow when sending email from new IP addresses?
To prevent reputation shock it's a good idea to not send too much too fast.
Do you send first to your long term subscribers or newer email addresses?
Perhaps you send first to the email addresses with the best open rates?
Of course, don't forget to cover the basics in our http://www.emailquestions.com/email-articles/2437-top-10-email-marketing-tips.html
To prevent reputation shock it's a good idea to not send too much too fast.
Do you send first to your long term subscribers or newer email addresses?
Perhaps you send first to the email addresses with the best open rates?
Of course, don't forget to cover the basics in our http://www.emailquestions.com/email-articles/2437-top-10-email-marketing-tips.html