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2003 - Badmail -- What is it?

I'm a little new to mail management so you patience is appreciated....

I have Ex 2003  loaded for a year ran ok.  Setup a "replication" server for backup and mail stopped.   After some reseach I think it had something to do with the badmail folder (37K files) on the first server.

Took the second server offline, and things seem to be working again.....

Current questions:

1.  How can I find those lost emails?   Are they in the badmail?  Message tracking was off?   On now
2.  The build versions were different between the Exc Servers.   I'd like to move to the current version but can't seem to get the older version to do an upgrade from the CD.   Suggestions on how'd u do this?
3.  What is the badmail folder?  How can I read the email in there?
      What is the difference between .bdp   and .bad files?
4.  When looking in the Ex Sys Mgr and I see the users listed, where are the "items" it says the user has?   Are these actually saved?  Can they be read?

1 Solution
The bad mail folder is simply for mails, which have problems, like invalid mail headers and something more. The folder contains ASCII files, usually two three for every mail, open them using notepad, and you see, what is in there. Most of them is spam.

1.) Which lost emails? As your server stopped accepting emails? This depends on, what happended in the meanwhile and how your mail system is setup. If you do not have a backup mail queue at your provider (either POP3 boxes or a mail queue), the mails are sent back to sender with a NDR. But also have a look at "queue" an "in" folders, which are beside the BadMail folder.

2.) Which build number? Note that Exch uses the SMTP service of Win2K, WIN 2K3. The build, you can see within the mail header is not the build of the Exchange Server but the build of the SMTP service (which depends on W2K service packs).

3.) See above, use notepad to read them, one for the mail, one for the addresses and maybe one for the NDR.

4.) You mean, the size and the number of objects stored within a mailbox in the private information store? You can read them only by using a client or by exporting them. What do you mean by "actually saved"? These are the items really stored in the mailbox, yes. But note, the the number of objects is not the same than the number of mails.

An additional note: You can setup a backup folder for public folders, not really for mailboxes, as mailboxes are stored on one physical machine. A good backup solution is the better idea. That also means, if you setup a second exchange for your domain, you have to make sure, that the mail flows to the right sever. If your second server gets the mails, and your first server hosts the mailboxes, you have to make sure, that the second server knows, what to do with mails for the first server. This may be the reason, why the mails stopped with your second server.

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