The Emails sent by my webform in Wordpress are falling in SPAM on Gmail

Hi
I hope that somebody can help me.
I am having problems with the emails sent by my website in wordpress, I have a webform of contact and I want that my visitors send me an email requesting information, but this emails are falling in spam on my gmail account.

VPS debian 8 x64 - ISPconfig 3.0.5.4p8
My DNS zone in ISPconfig looks like this
serverdomain zone's
=========================================================================================
SOA mymaindomain.com
A mymaindomain.com 1XX.1XX.8X.2XX 0 3600
A mail 1XX.1XX.8X.2XX 0 3600
A ns1 1XX.1XX.8X.2XX 0 3600
A ns2 1XX.1XX.8X.2XX 0 3600 <--- Is the same above, everybody uses 2 NS but I have only one
A www 1XX.1XX.8X.2XX 0 3600
MX mymaindomain.com mail.mymaindomain.com 10 3600
NS mymaindomain.com mymaindomain.com 0 3600
NS mymaindomain.com mymaindomain.com 0 3600 <--- this looks duplicated I don't know if is necesary for the NS2=NS1
TXT v=spf1 a mx ip4:1XX.1XX.8X.2XX -all

Reverse Domain myserverdomain.com zone's
==========================================================================================
SOA 8X.1XX.1XX.in.addr.arpa.
PTR 2XX mymaindomain.com 0 86400 <--- the last digits of my Static IP
TXT srv.mymaindomain.com v=spf1 a mx ip4:1XX.1XX.8X.2XX -all 0 86400

srv.mymaindomain.com is the server name (hostname)
the installation is a real server in a commercial hosting
Also I installed Roundcube and configure the remote user also.
Please tell me how I can do to avoid that my server is not marked like spammer or fall in the black list.
Thanks

 

Validate your SPF-Record, tryout DKIM (any maybe DMARC) for your domain and check your mailserver-setup

BTW: if you hide the relevant data (at least your ip and domain) it´s not possible to find any reason....

 

Ok florian030
I do the mailserver-setup 1. matching reverse DNS
in console:
root@srv1:/# dig +short mail.luisurbina.com.ve
XXX.XXX.XXX.XXX
root@srv1:/# dig +short -x XXX.XXX.XXX.XXX
root@srv1:/# dig +short mydomain.com
XXX.XXX.XXX.XXX
root@srv1:/# dig +short -x XXX.XXX.XXX.XXX

when I do dig +short -x with-IP, no respose!
I have 5 domains but the main for hosting is luisurbina.com.ve that I have in the main configuration of ISP.
Regards
Luis

 

You have some errors in your zone-file. Check it with http://www.intodns.com/luisurbina.com.ve

 

Thanks for your anwser Jesse
I am using Wordpress LMS with contact form 7 plugin, this plugin is configurated and send emails well, the point is The customer fill the email form and this email is send to [email protected] and this email need to be forwarded to [email protected] account.
Thinking I found tree options:
1) forward the email: contact form -> [email protected] -> [email protected] (option where I was fighting)
2) give the right configuration in the customer account to access this email by POP/IMAP
3) create the accout [email protected] like email forward in ISPconfig. (option where I was fighting too)
I read that this occurs when the SPF and PTR have bad configuration, but I am my own ISP, jejeje I don't know how fix this because I bought my domain .com.ve point it to my VPS by DNS zone, If someone can give me a hand I'll be very grateful. In fact I am very grateful with all the tips received for all of you.
Thx

 

OK, I can see the errors, Could you tell me some tutorial or instructions to correct these details?
The domain is pointed directly of NIC.VE to my VPS by NS names in my DNS zone created in ISPConfig, but there are several things that I have not clear.
1) Of course I have to have a DNS zone to my server, but I have to create another DNS zone record for the reverse zone?
2) The SPF and PTR my be exist on both DNS zones or only in main zone?
3) I need create a DNS zone for each customer domain that I create? NS1.customer1 .... NS1.customer2, etc.?
I can not think of another
Thanks