Add this TXT record:
v=spf1 a include:_spf.google.com ~all
Reference:
http://support.google.com/a/bin/answer.py?hl=zh-Hant&topic=2759192&ctx=topic&answer=178723
Add this TXT record:
v=spf1 a include:_spf.google.com ~all
Reference:
http://support.google.com/a/bin/answer.py?hl=zh-Hant&topic=2759192&ctx=topic&answer=178723