How to avoid being added to spam when sending mail from the server via yandex?

Question

linux

I set up sending mail notifications from the linux server via yandex.ru, I follow this instruction . When sending a report, a message appears stating that the message was returned because. this is spam.

]# mdadm --monitor --scan --test --oneshot
sendmail: the server did not accept the mail
sendmail: server message: 554 5.7.1 Message rejected under suspicion of SPAM 1435436859-mdKl1APHme-RcR0A3Sq
sendmail: could not send mail (account default from /etc/msmtprc)

Answer 1

Исходя из опыта и требований полный список :
1. Корректное имя отправляемого сервера ( PTR , hostname , mailname )
2. DKIM , SPF , DMARC политики
3. отсутствие в черных списках глобальных.

Answer 2

1. Not in DNSBL-bases
2. PTR
3. DKIM