At the Progressive Technology Project, we have been struggling with getting our mass emails out more quickly for quite some time. However, since we went from 5.13 ESR to 5.21 things seemed to have gotten worse. And there is no change with the latest 5.27 ESR. After countless hours trying to sift through all the factors (of course there are way more factors then just the CiviCRM core version!), I'm turning to the community for ideas.
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