mails de erro de envio de mensagem

matam-me por dentro.

escondidas entre estas linhas
by smtp1.ist.utl.pt (Postfix) with ESMTP id 5B48070011DF;
Thu, 25 Oct 2007 21:12:33 +0100 (WEST)
X-Virus-Scanned: by amavisd-new-2.4.2 (20060627) (Debian) at ist.utl.pt
Received: from smtp1.ist.utl.pt ([127.0.0.1])
by localhost (smtp1.ist.utl.pt [127.0.0.1]) (amavisd-ne

e estas
SUQzAwAAAAVkFlRQRTIAAAANAAAB//5GAGUAaQBzAHQAVElUMgAAAEUAAAH//k0AeQAgAE0AbwBv
AG4AIABNAHkAIABNAGEAbgAgACgAQgBvAHkAcwAgAE4AbwBpAHoAZQAgAFIAZQBtAGkAeAApAFRQ
RTEAAAANAAAB//5GAGUAaQBzAHQAVFJDSwAAAAcAAAH//jAAMwBUQUxCAAAALQAAAf/+SwBpAHQA
cwB1AG4AZQAgAE0AYQBpAHMAbwBuACAAVgBvAGwALgAgADQAVFlFUgAAAAsAAAH//jIAMAAwADcA
Q09NTQAAAAUAAABlbmcAQVBJQwABcSMAAABpbWFnZS9qcGVnAAAA/9j/4AAQSkZJRgABAQAAAQAB

normalmente aparece a pessoa a quem nao conseguiste mandar o mail
encontrar essa linha é uma coisa que se aprimora com o tempo.