As nowadays anyone who has little knowledge can create a form and send bulk mails from any email address, spammers may use your Google Apps Email address and send mails from it.
And then in this situation recipient mail take your mails as spam and if you send something important then it might go to Spam folder too.
How To Fix :-
The best way to fix it is to authenticate your Google Apps Account using SPF (Sender Policy Framework). Using SPF recipient’s mail server verify that which server is sending email and whether its allowed to send mail on behalf of Domain or Not.
Open your domain control panel and navigate to DNS records setting, we need to add a new TXT records to your domain and set it value as :-
v=spf1 include:_spf.google.com ~all
Server will take 3-4 Hrs to take effect, after that you can check whether your effort has been successful or not, to check SPF records of your domain do this :-
- Launch Command Prompt (run->CMD),
- On command prompt type following commands in the sequence as they are here :-
- set query=txt
Check Your SPF :-
If you wanna check your SPF records are working or not then just send a blank email to firstname.lastname@example.org and within few seconds you will get a reply and check your SPF in it.