Craigslist Bulk Email Sender - repost

I need reliable MASS eMail sender. Majority emails from [login to view URL] must be able to send out. Example: job-XXXXXXXX(@)[login to view URL] Must be able to send up to 50,000 Craigslist emails in one week. Emails can be spread out within the CL limits/monitors. Must incorporate everything that we need to successfully bulk email CL addresses without having IP banned, etc. Helpful if you're familiar with Craigslist marketing and emailing rules. Feel free to contact with questions. Thank you for your responses.