I'm a bit desperate, so apologies for this. I'm running my own postfix at my own domain, and gmail rejects it with "550-5.7.1 likely unsolicited mail".<p>I've searched it all, SPF/DKIM/DMARC recommendations from google (all work fine), the postmaster tools (are empty because I'm not sending lots of mail), spamhaus and friends do not have neither me nor my IP neighbours as spammers. (I'm not an open relay either).<p>There is a submission page at gmail where you would send a mail that is rejected, promising that your setup is good, and they say they would look at it in two weeks time. I've tried that several times and there's neither response nor change in behavior from the gmail side in months.<p>If there's something I missed, kindly tell, I'll try that; but I'm afraid there's nothing else to try, and if you know someone who knows someone, could there be done something about it possibly?<p>Thanks!