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451 4.4.1 timeout writing message

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451 4.4.1 timeout writing message - 2.Oct.2009 5:10:57 AM

aanniill

Posts: 1
Joined: 2.Oct.2009
Status: offline

Hi,

i am using exchenge 2007 enterprise and i have a strange problem. i can get mail from any domain but one of them can not send me mail with some attachments. i can get mail from that domain without attachment but when they attached something i can not get mail. and sender gets

451 4.4.1 timeout writing message to mail.domain.com.: Broken pipe <address@domain.com>... Deferred
Warning: message still undelivered after 4 hours Will keep trying until message is 5 days old

error. Also they can send me those mails to my yahoo or gmail addresses. And when i forward these mails to my address, i can get mail with attachments. so i think there is no problem with these attachments. and there is not any problem with senders address because i can get mail from them without any attachment or with some attachment.

i am so confused.

Thanks.

ANIL