Gmail couldn't verify that "your.domain" actually sent this message (and not a spammer).
This is a step by step guide to fix "Gmail couldn't verify that "your.domain" actually sent this message (and not a spammer)."
This issue caused because Gmail couldn't verify the sender is authenticated, e-mail is authenticated or verified using DKIM (DomainKeys Identified Mail)and SPF (Sender Policy Framework .)
#gmail #not_spammer