Issue Emails arrive in gmail spam

[optimix]

Why when I send an email from roundcube to gmail the client receives it in spam ? can anyone give me a solution or tell me how I can fix it ! THANK YOU

 

[Bitpalast]

When you send the same mail through your server by an email client attached to the server, does GMail categorize it as spam, too?

 

[optimix]

Yes Sir . They arrive but they get to spam and it works only with gmail if I try to send one to yahoo or hotamil it doesn't work soporte@optimix.es

 

[Bitpalast]

In this case you need to contact GMail support on it. They operate an intransparent blacklist. It is not possible to determine the cause why emails go to spam for outsiders.

 

[optimix]

ok and for yahoo they don't even arrive ?

 

[Bitpalast]

You can check if your server's IP is listed with common blacklists here:

MultiRBL.valli.org - Blacklist, Whitelist and FCrDNS check tool

Free multiple DNSBL/RBL lookup and FCrDNS check tool. Test the IP (IPv4 or IPv6) of your mailserver on more than 200 blacklists and whitelists.

multirbl.valli.org

But Yahoo, Microsoft (Hotmail) and GMail all operate their own "secret" blacklists that cannot easily be queried from the outside. Maybe the MultiRBL website can help you to identify a general spam issue with your server's IP.