Yes, it is possible to mass mail sellers with products' images, description, price, lot number, etc. There are different software and tools available for mass mailing, such as Mailchimp, Constant Contact, Sendinblue, etc. These tools allow you to create and send email campaigns to a large number of recipients, and even segment your list to choose specific sellers.
To send images and other product details, you can embed them in the email or include links to your website or product page. You can also customize your email templates to match your brand and add personalized messages for each seller.
Before sending mass emails, make sure that you comply with email marketing regulations and that you have the consent of the recipients to receive your emails.