Hello, So we sometimes send out 30.000 mails. We do this with SparkPost. Which seems to work fine. Unfortunately the sending process is very slow. We work with 1 sending server. Which is SparkPost. I can see some tips on the Knowledgebase and all settings seem to be correct. Is there anyone who can give us some tips and maybe some screenshots of sending settings pages that can help us speed up the sending process? Reading on the forum people get alott higher sending rate but ours is pretty low and will take ages to send out the 30.000 mails....not minutes but longer then a day. The problem does not seem to be the server since we are using SparkPost, SparkPost says we can send alott faster then we do now. So there must be someting wrong in our settings which causes this. Any tips are welcome. Edit: I added screenshots of current settings. Hope this helps.