Hallo I have SM version 16.3.6543

 

Emails sending and receiving on my server is ok, except receiving email from specify email. In logs i have found this, anybody any idea how to correct?

 

[2018.01.05] 07:06:50 [193.228.234.19][4119860] cmd: EHLO dns.vzp.cz
[2018.01.05] 07:06:50 [193.228.234.19][4119860] rsp: 250-mail.nempt.cz Hello [193.228.234.19]250-SIZE 31457280250-AUTH LOGIN CRAM-MD5250-STARTTLS250-8BITMIME250 OK
[2018.01.05] 07:06:50 [193.228.234.19][4119860] cmd: MAIL FROM:<xxx@vzp.cz> SIZE=834944
[2018.01.05] 07:06:50 [193.228.234.19][4119860] rsp: 250 OK <xxx@vzp.cz> Sender ok
[2018.01.05] 07:06:50 [193.228.234.19][4119860] cmd: RCPT TO:<xxx@nempt.cz>
[2018.01.05] 07:06:50 [193.228.234.19][4119860] rsp: 250 OK <xxx@nempt.cz> Recipient ok
[2018.01.05] 07:06:50 [193.228.234.19][4119860] cmd: DATA
[2018.01.05] 07:06:50 [193.228.234.19][4119860] rsp: 354 Start mail input; end with <CRLF>.<CRLF>
[2018.01.05] 07:06:51 [193.228.234.19][4119860] Exception: An object reference is not set to an instance of an object.
[2018.01.05]    v MailService.TcpServerLib.SMTP.SMTPSession.#ueb(String #t9i, SpamCheckResult[] #Cc, Boolean #heb)
[2018.01.05]    v MailService.TcpServerLib.SMTP.SMTPSession.#teb(String #q4i)
[2018.01.05]    v MailService.TcpServerLib.SMTP.SMTPSession.#cGn(String #t9i, Boolean #QGn, Boolean #pGn, Boolean& #qGn)
[2018.01.05]    v MailService.TcpServerLib.SMTP.SMTPSession.#ieb(Byte[] #sE, String& #zbc)
[2018.01.05] 07:06:51 [193.228.234.19][4119860] data transfer failed. 550 unknown error occurred during data transfer. closing transmission channel.
[2018.01.05] 07:06:51 [193.228.234.19][4119860] rsp: 550 unknown error occurred during data transfer. closing transmission channel.
[2018.01.05] 07:06:51 [193.228.234.19][4119860] disconnected at 5. 1. 2018 7:06:51

 

Thank for your reply. Johny