Выражение встречается в следующем контексте:

The attached message had PERMANENT fatal delivery errors!

After one or more unsuccessful delivery attempts the attached message has been removed from the mail queue on this server. The number and frequency of delivery attempts are determined by local configuration parameters.

YOUR MESSAGE WAS NOT DELIVERED TO ANY OF IT'S RECIPIENTS!

Failed address: passionate@nm.ru

--- Session Transcript ---
MX-record resolution of [nm.ru] in progress (DNS Server: 192.168.0.1)... P=010 D=nm.ru TTL=(240) MX=[mail.nm.ru] {212.48.140.156} Attempting MX: P=010 D=nm.ru TTL=(240) MX=[mail.nm.ru] {212.48.140.156} Attempting SMTP connection to [212.48.140.156 : 25] Waiting for socket connection... Socket connection established Waiting for protocol initiation... 220 grif.newmail.ru ESMTP EHLO multico.ru 250-grif.newmail.ru 250-PIPELINING 250 8BITMIME MAIL From:<...> 250 ok RCPT To:<...
nm.ru> 250 ok DATA 354 go ahead Sending to [212.48.140.156] Transfer Complete. 552 sorry, that message size exceeds my databytes limit (#5.3.4) QUIT
--- End Transcript ---

: Message contains [1] file attachments

Заранее спасибо