The reported error was “Сбой команды RCPT TO <почтовыя ящик получателя>: <unknown[11.11.11.11]>: Client host rejected: Access denied”.
====лог отправки Evalutino с ошибкой postfix/smtpd[2060]: connect from unknown[11.11.11.11] postfix/smtpd[2060]: setting up TLS connection from unknown[11.11.11.11] postfix/smtpd[2060]: Anonymous TLS connection established from unknown[11.11.11.11]: TLSv1 with cipher AES256-SHA (256/256 bits) postfix/smtpd[2060]: NOQUEUE: reject: RCPT from unknown[11.11.11.11]: 554 5.7.1 <unknown[11.11.11.11]>: Client host rejected: Access denied; from=public@site1.ru to=pochta@ya.ru proto=ESMTP helo= postfix/smtpd[2060]: lost connection after RCPT from unknown[11.11.11.11] postfix/smtpd[2060]: disconnect from unknown[11.11.11.11]
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====лог отправки Thunderbird где все ок postfix/smtpd[2106]: connect from unknown[11.11.11.11] postfix/smtpd[2106]: setting up TLS connection from unknown[11.11.11.11] postfix/smtpd[2106]: Anonymous TLS connection established from unknown[11.11.11.11]: TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits) postfix/smtpd[2106]: 9A33E204F0: client=unknown[11.11.11.11], sasl_method=PLAIN, sasl_username=man@server.com postfix/cleanup[2114]: 9A33E204F0: message-id=11111111111111111111111@server.com opendkim[1288]: 9A33E204F0: DKIM-Signature field added (s=default, d=server.com) postfix/qmgr[1598]: 9A33E204F0: from=man@server.com, size=736, nrcpt=1 (queue active) postfix/smtp[2117]: certificate verification failed for mx.yandex.ru[22.22.22.22]:25: untrusted issuer /C=PL/O=Unizeto Sp. z o.o./CN=Certum CA postfix/smtp[2117]: 9A33E204F0: to=pochta@ya.ru, relay=mx.yandex.ru[22.22.22.22]:25, delay=2.1, delays=0.45/0.02/0.58/1.1, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued on mxfront6g.mail.yandex.net as 11111111111-2222222222-uk7O9HlM) postfix/qmgr[1598]: 9A33E204F0: removed