Hola, tengo un resultado como el siguiente, alguen me lo puede explicar, para si el error es mio o del remitente:

Message-id: <20070419144855. 7BC0159025@server>
 Date: Thu, 19 Apr 2007 09:09:18 -0500
 From: Pre <pre@dominio.org.co>
 To: RINTRAG <rintr@yahoo. Com>
 Subject: RV: Colombia-derechos 18-04-2007

Your message cannot be delivered to the following recipients:

 Recipient address: @mail1.une.net. Co. Lmtp:rintr@lmtpcs-daemon
 Original address: rintr@epm.net.co
 Reason: LMTP transmission failure has occurred
 Diagnostic code: lmtp;550 5.2.2 Delivery failed: Over quota
 Remote system: dns;mail1.une.net. Co (TCP|10.158.109. 1|45726|10.158.109. 25|225) (store01.une.idc -- Server LMTP [Sun ONE Messaging Server 6.2-7.05 [built Sep  5 2006]])
 Recipient address: @mail1.une.net. Co. Lmtp:rintratextilit@lmtpcs-daemon
 Original address: rintratextilit@epm.net.co
 Reason: LMTP transmission failure has occurred
 Diagnostic code: lmtp;550 5.2.2 Delivery failed: Over quota
 Remote system: dns;mail1.une.net. Co (TCP|10.158.109. 1|45726|10.158.109. 25|225) (store01.une.idc -- Server LMTP [Sun ONE Messaging Server 6.2-7.05 [built Sep  5 2006]])