Vesta Control Panel - Forum

I ended up here looking for solutions for this issue. This is already fixed in the github repo (commit https://github.com/serghey-rodin/vesta/commit/d563dcd12b6ae90739e45fc512cbac51771e225c#diff-8f27b20d0219fb355aadd60724e65ad2 ), the fix is mentioned in another issue (for what I think is the same ...

To me, roundcube used php to send mail and that caused problems, I had to set it up so send via SMTP so that it wouldn't be marked as spam in some providers (see below).

I'd recommend setting up a couple of free accounts with them in order to test deliverability on their servers, as even mail ...