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<forumdestek@donanimhaber.com>: host 77.92.152.20[77.92.152.20] said: 550 5.1.1 sorry, no mailbox here by that name (chkuser) (in reply to RCPT TO command)
Final-Recipient: rfc822; forumdestek@donanimhaber.com Original-Recipient: rfc822;forumdestek@donanimhaber.com Action: failed Status: 5.1.1 Remote-MTA: dns; 77.92.152.20 Diagnostic-Code: smtp; 550 5.1.1 sorry, no mailbox here by that name (chkuser)