I've try to find info about headers but not find any info on the site.Is there any link where I can find more info about Comments,Organization etc. on maxbulk?
Do you mean the headers in the custom headers panel?
Comments Add a comment about your message or yourself. Organization Add information about your company or organization. Errors-To Ask recipient Mail Exchanger server to send bounces to a different address. Return-Path Set the message return path. Note that this header most of the time can't be overwritten. User-Agent Add the name and version of the mailer. X-Mailer Same as User-Agent. X-Confirm-Reading-To Ask for a delivery receipt. X-Legal Add legal information about your message. List-Unsubscribe The email address to unsubscribe from your list. List-Subscribe The email address to subscribe to your list. List-Owner The email address of the owner of the list. List-Help The email address to get help about the list. X-List-Host The list hosting server. List-Software The software used to send to the list.
There are more... You may find a list on the internet.