I've been running a few email campaigns and we recently obtained over 5000 contacts. Paying more for this service would be worth it, if the emails are sent to those 5000 people. Unfortunately, despite me selecting all of my lists when sending out a campaign, only 2600 end up receiving the email. The reports note nothing of this, and provide no explanation as to why only half of my contacts got the email. So, why is it doing this? Why am I paying more for a service while actually sending emails to less people? I noticed that, over time, the number of contacts receiving my emails has decreased, could that have something to do with it? What can I do to ensure that emails are sent to all of my contcts?
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