IredMail does not accept mail. What could be the reason?

Question

postfix

Hello, I installed the iredmail package, it sends mail normally. but does not accept from gmail boxes, etc.
Log mail
May 23 11:46:17 mail postfix/submission/smtpd[1530]: connect from mail.test.com.ua[127.0.0.1]
May 23 11:46:17 mail postfix/submission/smtpd[1530]: Anonymous TLS connection established from mail.jupiter9.com.ua[127.0.0.1]: TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)
May 23 11:46:17 mail postfix/submission/smtpd[1530] : 477D17021DDD: client=mail.jupiter9.com.ua[127.0.0.1], sasl_method=LOGIN, [email protected]
May 23 11:46:17 mail postfix/cleanup[1534]: 477D17021DDD: message- id=<[email protected]>
May 23 11:46:17 mail postfix/qmgr[32007]: 477D17021DDD: from=, size=579, nrcpt=1 (queue active)
May 23 11:46:17 mail roundcube: User [email protected] [93.74.160.82]; Message for [email protected]; 250: 2.0.0 Ok: queued as 477D17021DDD
May 23 11:46:17 mail postfix/submission/smtpd[1530]: disconnect from mail.test.com.ua[127.0.0.1]
May 23 11:46:17 mail postfix /10025/smtpd[1544]: connect from mail.test.com.ua[127.0.0.1]
May 23 11:46:17 mail postfix/10025/smtpd[1544]: EAFE67021DE2: client=mail.test.com.ua [127.0.0.1]
May 23 11:46:17 mail postfix/cleanup[1534]: EAFE67021DE2: message-id=<81b8d73f02c079d9cc0cdecc734[email protected]>
May 23 11:46:17 mail postfix/qmgr[32007]: EAFE67021DE2: from=, size=1729, nrcpt=1 (queue active)
May 23 11:46:17 mail postfix/10025/smtpd[1544]: disconnect from mail.test.com.ua[127.0.0.1]
May 23 11:46:17 mail amavis[23631]: (23631-20) Passed CLEAN {RelayedInternal}, ORIGINATING/MYNETS LOCAL [127.0.0.1]:55272 -> , Queue-ID: 477D17021DDD, Message-ID: <81b8d73f02c079d9cc25c4a4a @test.com.ua>, mail_id: SY5VL0N4Y704, Hits: -1, size: 579, queued_as: EAFE67021DE2, dkim_new=dkim:jupiter9.com.ua, 618 ms, Tests: [ALL_TRUSTED=-1]
May 23 11: 46:18 mail postfix/smtp-amavis/smtp[1539]: 477D17021DDD: to=, relay=127.0.0.1[127.0.0.1]:10026, delay=0.73, delays=0.09/0.01/0/0.63, dsn=2.0 .0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as EAFE67021DE2)
May 23 11:46:18 mail postfix/qmgr[32007]: 477D17021DDD: removed
May 23 11:46:19 mail postfix/smtp[1435]: connect to gmail-smtp-in.l.google.com[2a00:1450:4010:c08::1a]:25: Network is unreachable
May 23 11:46:19 mail postfix/smtp[1435]: Untrusted TLS connection established to gmail-smtp-in.l.google.com[173.194.73.26]:25: TLSv1.2 with cipher ECDHE-RSA-AES128- GCM-SHA256 (128/128 bits)
May 23 11:46:20 mail postfix/smtp[1435]: EAFE67021DE2: to=, relay=gmail-smtp-in.l.google.com[173.194.73.26]:25, delay=2.2, delays=0.03/0/1.9/0.29, dsn=2.0.0, status=sent (250 2.0.0 OK 1495529180 u22si10761307ljd.280 - gsmtp)
May 23 11:46:20 mail postfix/qmgr[32007] : EAFE67021DE2: removed
May 23 11:46:37 mail postfix/postscreen[1564]: fatal: error reading /var/lib/postfix/postscreen_cache.db: Unknown error -30986
May 23 11:46:38 mail postfix/master[ 32005]: warning: process /usr/libexec/postfix/postscreen pid 1564 exit status 1
May 23 11:46:38 mail postfix/master[32005]: warning: /usr/libexec/postfix/postscreen: bad command startup -- throttling

Answer 1

May 23 11:46:37 mail postfix/postscreen[1564]: fatal: error reading /var/lib/postfix/postscreen_cache.db: Unknown error -30986
May 23 11:46:38 mail postfix/master[32005]: warning : process /usr/libexec/postfix/postscreen pid 1564 exit status 1
May 23 11:46:38 mail postfix/master[32005]: warning: /usr/libexec/postfix/postscreen: bad command startup -- throttling

Apparently something is wrong with the postscreen settings.

Answer 2

The problem is in configuring the zone DNS:
I had the same problem. The
address of the mail receiving domain must match the name and must be directed to the host IP.
If the host name is one and the name of the domain created in the admin panel is different, he does not want to accept I
suspect you need to pick DNS