====== DNS для почты ======
<code bash>
;; A Records
autoconfig.merrcloud.ru.	1	IN	A	95.165.25.210
mail.merrcloud.ru.	1	IN	A	95.165.25.210

;; MX Records
merrcloud.ru.	1	IN	MX	10 mail.merrcloud.ru.

;; PTR Records
mail.merrcloud.ru.	1	IN	PTR	210.25.165.95.in-addr.arpa.

;; SRV Records
_imaps._tcp._tcp.merrcloud.ru.	1	IN	SRV	10 10 993 mail.merrcloud.ru.
_smtp._tcp._tcp.merrcloud.ru.	1	IN	SRV	10 10 25 mail.merrcloud.ru.
_submission._tcp._tcp.merrcloud.ru.	1	IN	SRV	10 10 587 mail.merrcloud.ru.

;; TXT Records
dkim._domainkey.merrcloud.ru.	1	IN	TXT	"v=DKIM1; p=MIIBIjANB..."
_dmarc.merrcloud.ru.	1	IN	TXT	"v=DMARC1; p=none"
mail._domainkey.merrcloud.ru.	1	IN	TXT	"v=DKIM1; p=MIIBIjANB..."
merrcloud.ru.	1	IN	TXT	"v=spf1 a mx ip4:95.165.25.210 ~all"
</code>