Segmentation is important to step away from the mass mailing principle.
By segmenting your database based on the info you have, you will start with specific target groups and send them campaigns that really suit their needs.
Later you can combine database … (more)

Spam is caused because of different reasons: spammy content in the mails low interest in previous mails bad reputation of the sender domain etc.. This means that different causes need to be checked. Kind regards