I am working for a small company and we are sending out newsletter-emails to our customers like every 3 months. That are about 2000 emails every time.
we are using our own (old access & outlook) solution to send out the emails.
the problem with our recent mailings is that our provider's mailserver sometimes seems to be listed in "block-lists" or "spam-lists". so the email gets recjected by the receiver's provider. this happens for about 10% of the emails sent.
we are a small company and I guess we cannot afford an expensive "professional" solution.
so my main question is: what can we do to avoid this?
we don't even know which of our provider's email-servers will send the emails before it happens. so there is no way to look up some of the popular block-lists. switching between 2-3 providers would maybe worth a try - but in the end it's very random which of the servers is on which blocklist.
is there a solution we can do ourselves (we got C# and PHP programmers) ? is there a "cheap" professional solution?
how do big professional services like "mailchimp" handle these problems?
thanks for any help!