Tips on Legit Mass Mail Distribution

Follow mass distribution guidelines from recipients' providers (Google, Yahoo, Outlook/Hotmail)

Include unsubscribe option in your mail

Use header of “Precedence: bulk” in the mass mail

Abide by RFC2822's email writing rules

Use correctly set-up, SMTP-capable mail server instead of ordinary mass mailing software that leaves a flaggable signature

Avoid using email lists bought from shady mass marketers as they may contain marked email addresses