The most simple way of sending bulk email is using the BCC option in Tamago-DB.

On the grids (Leads, Candidates, Leads and All Contacts), when selecting one for more contacts, you can choose the  'BCC' option in the mass action menu of the grid.

When choosing BCC, it will use your default email client (Outlook, Apple Mail, Chrome (Gmail), ...) with the BCC field populated with the email addresses of the contacts selected in Tamago-DB. As this is your actual email client, Tamago-DB has no connection to this. Personalization is not possible when using BCC.