From my personal experience (around 5 years), iDealsmtp and Mailgun are some of the cheapest options for bulk personalized emails. iDealsmtp is especially budget-friendly for high-volume sending, so you can try both and see what works best.
From my personal experience (around 5 years), iDealsmtp and Mailgun are some of the cheapest options for bulk personalized emails. iDealsmtp is especially budget-friendly for high-volume sending, so you can try both and see what works best.