I have a couple of domains running on my VPS with VirtualMin.
I have DKIM enabled, reverse DNS is setup and SPF records are added by Virtualmin.
Now I have a main account (admin) which I can easily use to send emails to gmail accounts with, they don't appear in the spam folder.
When I use an additional user from the same domain they ALWAYS go in to spam folder of Gmail.
I tried a couple of spam checkers and they all come back like this:
Main account: Summary of Results SPF check: pass DomainKeys check: neutral DKIM check: pass Sender-ID check: pass SpamAssassin check: ham
Another user from the same domain:
SPF check: pass DomainKeys check: neutral DKIM check: pass Sender-ID check: pass SpamAssassin check: ham
I cannot check gmails spam score, or why they are marked as spam, but are there things I can do? This happends with every domain on the virtualmin installation.
I also found out that some businesses that I wrote to also didn't get my email, probably filtered, but when I wrote them with the main mail address they received it. Exact same message, same outlook 2013 client.