Mail to gmail address ends up in spam folder

[TommyRC]

I'm using 11.5.30 on a linux – CentOs 6.4 final, Setup is VPS, mail server is Postfix.

We host about 45 domains on the server, all installed with OpenCart web-shops.

ALL mail which is sent from the server to a gmail address, regardless if it is order-confirmations from the shops, or it is normal mail sent from a client (PC) via domain smtp, or it is sent via servers webmail, end up in the receivers spam-folder.

It is a rapid growing problem and ALL input and instruction is appreciated !!

BR

Tommy

 

[KonstantinosS]

I'm using 11.5.30 on a linux – CentOs 6.4 final, Setup is VPS, mail server is Postfix.

We host about 45 domains on the server, all installed with OpenCart web-shops.

ALL mail which is sent from the server to a gmail address, regardless if it is order-confirmations from the shops, or it is normal mail sent from a client (PC) via domain smtp, or it is sent via servers webmail, end up in the receivers spam-folder.

It is a rapid growing problem and ALL input and instruction is appreciated !!

BR

Tommy

Use SMTP with authentication and enforce it by enabling message submission. You will have to inform your users to change their smtp outgoing port from 25 to 587, and you may want to consider using ssl/tls for added security and reverse DNS in the extreme case you don't have it already set up by your host on your IP addresses.

 

[TommyRC]

Thanks for your input, but I think we are already there
Only thing I'm not shure of is "reverse DNS"?

How do I check this and the other points in the panel?

Tommy

 

[KonstantinosS]

Thanks for your input, but I think we are already there
Only thing I'm not shure of is "reverse DNS"?

How do I check this and the other points in the panel?

Tommy

The first part is on mail settings, the reverse dns part can be checked using any web tool that can perform a PTR check on your mail domains. You only need to set the IPs to a specific domain (ie. yourdomain.com) if they are not set by your provider. You can always submit a ticket asking your hosting provider, since he's probably the one who can set it up from your end. At least, in my case, the provider had to set the IPs up.