Цитата: Полностью лог покажите.
Tue 2015-09-15 15:42:08: Session 1637; child 4; thread 0
Tue 2015-09-15 15:42:08: Accepting SMTP connection from [94.100.134.242:47191] to [193.104.69.228:25]
Tue 2015-09-15 15:42:08: --> 220 [193.104.69.228] ESMTP MDaemon 11.0.3; Tue, 15 Sep 2015 15:42:08 +0300
Tue 2015-09-15 15:42:08: <-- EHLO mx-relay42-dus.antispameurope.com
Tue 2015-09-15 15:42:08: --> 250-[193.104.69.228] Hello mx-relay42-dus.antispameurope.com, pleased to meet you
Tue 2015-09-15 15:42:08: --> 250-ETRN
Tue 2015-09-15 15:42:08: --> 250-AUTH=LOGIN
Tue 2015-09-15 15:42:08: --> 250-AUTH LOGIN CRAM-MD5
Tue 2015-09-15 15:42:08: --> 250-8BITMIME
Tue 2015-09-15 15:42:08: --> 250 SIZE 20480000
Tue 2015-09-15 15:42:08: <-- MAIL FROM:<******@flexim.de>
Tue 2015-09-15 15:42:08: Performing PTR lookup (242.134.100.94.IN-ADDR.ARPA)
Tue 2015-09-15 15:42:08: * D=242.134.100.94.IN-ADDR.ARPA TTL=(60) PTR=[mx-relay42-dus.antispameurope.com]
Tue 2015-09-15 15:42:08: * Gathering A records...
Tue 2015-09-15 15:42:08: * D=mx-relay42-dus.antispameurope.com TTL=(5) A=[94.100.134.242]
Tue 2015-09-15 15:42:08: ---- End PTR results
Tue 2015-09-15 15:42:08: Performing IP lookup (mx-relay42-dus.antispameurope.com)
Tue 2015-09-15 15:42:08: * D=mx-relay42-dus.antispameurope.com TTL=(5) A=[94.100.134.242]
Tue 2015-09-15 15:42:08: ---- End IP lookup results
Tue 2015-09-15 15:42:08: Performing IP lookup (flexim.de)
Tue 2015-09-15 15:42:08: * D=flexim.de TTL=(53) A=[176.221.47.27]
Tue 2015-09-15 15:42:08: * P=010 S=003 D=flexim.de TTL=(53) MX=[mx16a.antispameurope.com]
Tue 2015-09-15 15:42:08: * P=020 S=001 D=flexim.de TTL=(53) MX=[mx16b.antispameurope.com]
Tue 2015-09-15 15:42:08: * P=030 S=002 D=flexim.de TTL=(53) MX=[mx16c.antispameurope.com]
Tue 2015-09-15 15:42:08: * P=080 S=000 D=flexim.de TTL=(53) MX=[mail.flexim.de]
Tue 2015-09-15 15:42:08: * P=090 S=004 D=flexim.de TTL=(53) MX=[postfix.flexim.de]
Tue 2015-09-15 15:42:08: * D=flexim.de TTL=(53) A=[176.221.47.27]
Tue 2015-09-15 15:42:08: * D=flexim.de TTL=(53) A=[176.221.47.27]
Tue 2015-09-15 15:42:08: * D=flexim.de TTL=(53) A=[176.221.47.27]
Tue 2015-09-15 15:42:09: * D=flexim.de TTL=(53) A=[176.221.47.27]
Tue 2015-09-15 15:42:09: * D=flexim.de TTL=(53) A=[176.221.47.27]
Tue 2015-09-15 15:42:09: ---- End IP lookup results
Tue 2015-09-15 15:42:09: Performing SPF lookup (flexim.de / 94.100.134.242)
Tue 2015-09-15 15:42:09: * Result: none; no SPF record in DNS
Tue 2015-09-15 15:42:09: ---- End SPF results
Tue 2015-09-15 15:42:09: --> 250 <*****@flexim.de>, Sender ok
Tue 2015-09-15 15:42:09: <-- RCPT TO:<1234@tek-know.ru>
Tue 2015-09-15 15:42:09: Производится поиск DNS-BL (94.100.134.242 – соединение с IP)
Tue 2015-09-15 15:42:09: * zen.spamhaus.org - прошло
Tue 2015-09-15 15:42:09: * b.barracudacentral.org - прошло
Tue 2015-09-15 15:42:09: * dnsbl.sorbs.net - прошло
Tue 2015-09-15 15:42:09: ---- Конечные результаты DNS-BL
Tue 2015-09-15 15:42:09: --> 250 <1234@tek-know.ru>, Recipient ok
Tue 2015-09-15 15:42:09: <-- DATA
Tue 2015-09-15 15:42:09: Creating temp file (SMTP): c:\mdaemon\queues\temp\md50000348956.tmp
Tue 2015-09-15 15:42:09: --> 354 Enter mail, end with <CRLF>.<CRLF>
Tue 2015-09-15 15:42:09: Message size: 7792 bytes
Tue 2015-09-15 15:42:09: Performing DKIM lookup
Tue 2015-09-15 15:42:09: * File: c:\mdaemon\queues\temp\md50000348956.tmp
Tue 2015-09-15 15:42:09: * Message-ID: 6B666837-29AB-445B-8C39-2D24EA2B4E72@flexim.de
Tue 2015-09-15 15:42:09: * Result: neutral
Tue 2015-09-15 15:42:09: ---- End DKIM results
Tue 2015-09-15 15:42:09: Performing DomainKeys lookup (Sender: *****@flexim.de)
Tue 2015-09-15 15:42:09: * File: c:\mdaemon\queues\temp\md50000348956.tmp
Tue 2015-09-15 15:42:09: * Message-ID: 6B666837-29AB-445B-8C39-2D24EA2B4E72@flexim.de
Tue 2015-09-15 15:42:09: * Querying for policy: flexim.de
Tue 2015-09-15 15:42:09: * Querying: _domainkey.flexim.de ...
Tue 2015-09-15 15:42:10: * DNS: * Сервер имен не содержит допустимых записей нужного типа для этого домена.
Tue 2015-09-15 15:42:10: * Result: neutral
Tue 2015-09-15 15:42:10: ---- End DomainKeys results
Tue 2015-09-15 15:42:10: Passing message through AntiVirus (Size: 7792)...
Tue 2015-09-15 15:42:10: * Сообщение чистое (вирусов не обнаружено)
Tue 2015-09-15 15:42:10: ---- End AntiVirus results
Tue 2015-09-15 15:42:10: Создание сообщения successful: c:\mdaemon\queues\inbound\md50000338554.msg
Tue 2015-09-15 15:42:10: --> 250 Ok, message saved <Message-ID: 6B666837-29AB-445B-8C39-2D24EA2B4E72@flexim.de>
Tue 2015-09-15 15:42:10: <-- QUIT
Tue 2015-09-15 15:42:10: --> 221 See ya in cyberspace
Tue 2015-09-15 15:42:10: SMTP session successful (Bytes in/out: 7911/471)
Добавлено: Цитата: Может, у тебя ограничение по количеству RCPT TO: стоит?
Что-то не припомню такой настройки. Не напомните, где?