answer questions related to smtp servers

I have done lot of email marrketing in the past. i need questions like spf dkim, good bulk email hosting, godaddy, hostgator questions. dns update effect. time taken to create smtp server fast, email authentication questions. if you are experienced [login to view URL] servers, you can answer all these. i am into email marketing past 1 year and i need new smtp servers for other services. i need a good reputation. its wise to have 3 or 5 smtp servers. dont worry the list i use is optin and verified. i send newsletters too, one smtp server here for inbox. occasionally i like to do small bulk marketing wiyh other verified email database, so i prefer to keep another smtp server for same due to reputation issues. an expert can answer all these. thanks