LMTP timeout?

[Marten Lehmann]

Hello,

right now I'm receiving a lot of lines like this in my exim log:

2006-10-26 20:08:09 1Gd9YI-0004rv-FN == test at test.de R=mailbox_cyrus 
T=mailbox_lmtpunix defer (-1): LMTP timeout after end of data (20671 
bytes written)
2006-10-26 20:08:09 1Gd9Xx-0004lb-1g == test at test.de R=mailbox_cyrus 
T=mailbox_lmtpunix defer (-1): LMTP timeout after end of data (20561 
bytes written)
2006-10-26 20:08:09 1Gd9Xx-0004lk-Cf == test at test.de R=mailbox_cyrus 
T=mailbox_lmtpunix defer (-1): LMTP timeout after end of data (20804 
bytes written)
2006-10-26 20:08:09 1Gd9YO-0004v8-GM == test at test.de R=mailbox_cyrus 
T=mailbox_lmtpunix defer (-1): LMTP timeout after end of data (20884 
bytes written)

Why does LMTP time out? Is it after a certain load? Or after a certain time?

Regards
Marten