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how_to:vpop3_re-downloading_old_messages_from_isp_pop3_server

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how_to:vpop3_re-downloading_old_messages_from_isp_pop3_server [2011/11/21 15:41] – paulhow_to:vpop3_re-downloading_old_messages_from_isp_pop3_server [2026/01/05 09:31] (current) – paul
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 With recent versions of VPOP3 you can tell if this has happened by looking at the 'Received' headers of the message. The line which the VPOP3 POP3 collector adds shows the UID in the header line (UIDL=....), and you can compare the downloaded copies of a particular message. If the UIDs are different for the same message, then the ISP has re-assigned the messages' UIDs, so VPOP3 sees all the messages as ones it has not seen before With recent versions of VPOP3 you can tell if this has happened by looking at the 'Received' headers of the message. The line which the VPOP3 POP3 collector adds shows the UID in the header line (UIDL=....), and you can compare the downloaded copies of a particular message. If the UIDs are different for the same message, then the ISP has re-assigned the messages' UIDs, so VPOP3 sees all the messages as ones it has not seen before
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 +======VPOP3 v4 or earlier======
 +VPOP3 v2 or earlier stored a list of downloaded messages in a file called SRVRUIDL.DAT or SRVUIDLx.DAT, which could be affected by other software, so that needs to be checked as well, as described below
  
 =====SRVRUIDL.DAT file being deleted=====  =====SRVRUIDL.DAT file being deleted===== 
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 This problem will not happen in VPOP3 version 5 or later as this information is now stored in the main database. This problem will not happen in VPOP3 version 5 or later as this information is now stored in the main database.
  
 +There is no easy way to find which other program has the file open, because Windows does not report this information to VPOP3 - all it says is that the file is in use by another program, so VPOP3 cannot access it. 
  
 +Things to try are:
 +  * make sure that two copies of VPOP3.EXE are not running
 +  * make sure that a backup program is not copying the file(s)
 +  * make sure that a virus scanner is not scanning the file(s)
 +  * make sure that someone hasn't decided to open up the files in a text editor/etc
 +  * you can try using a program such as [[http://technet.microsoft.com/en-gb/sysinternals/bb896655.aspx|Handle]] to see what the other program is - but this only works if the file is held open by the other program for a long time. If it is just opened for a few seconds, then you will have to be very lucky to catch it when it has the file open
how_to/vpop3_re-downloading_old_messages_from_isp_pop3_server.1321890096.txt.gz · Last modified: 2018/11/14 10:44 (external edit)

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