On Mon, Apr 20, 2020 at 11:37 AM rps462 <rps...@gmail.com> wrote: > You could be hitting connection limits, recipient limits, maybe people are > flagging your stuff as spam .. who knows? If you wouldn't mind posting some > IPs that you're sending from so people can look, that'd be a start. > >> >> Sure. We've been online for about 5.5 years, and only send group email from one IP address, 66.175.222.12. We send email from ~100 domains, and from some large N of groups.io subdomains.
Mark
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