Haven't a clue what you mean. I run several mail servers and have no issues whatsoever with GMail. And I run through all the spam filtering, too, and only recall one that was inadvertently marked as spam but, iirc, the mailer was the problem.
Some networks are whitelisted for practical purposes. Google's one of them.
If necessary, I could provide a list of the subject lines of the emails that have been reported. A YC company, Zenefits, is one offender that comes immediately to mind.
But not until Monday. I'm going camping.
Example.com SEO Issues
Tough Times With Example.com? Needs Attention!!?
Get ranked higher: Example.com
Google optimization for Example.com
Get ranked higher : example.com
Website Audit Report to increase website traffic
Example.com - audit report now available
Give a glamorous new look to your website
Web Design Proposal example.com
Organic SEO Promotion For Example.com
So looks like all SEO and web-design advertising. "Re: Zenefits + Problem"
"Higher Targeted Traffic: Associatedtechs.Com"
"Re:re: UL,CE,ETL Split-core Current Transformer(0.333V or 1A/5A output) ,Rogowski coil,hall AC-DC transducer"
"Poor support processes could be costing you customers"
"Get ranked higher:"
"Higher Targeted Traffic: Associatedtechs.Com"
"Re: Zenefits + Problem"
"Re: Zenefits + Problem"
"Your Website...!"
"Get ranked higher: associatedtechs.com"
"Google Update for: associatedtechs.com"
"How to increase your website traffic and generating leads??"
"Zenefits + Problem"
"Mobile Apps Development"
"Digital marketing proposal- www.associatedtechs.com"
This isn't a complete list, sadly, since it turns out the daemon isn't logging ban attempts against whitelisted networks. I should fix it so that it does.