Mail won't display the message content

You will probably be able to just drag the preview pane up from the bottom of the Mail window. There will be a little oval o in the center of the bottom bar..

Curious, hit reply and see if the message become visible.

Same problem here. Some (few) email bodies are not shown. When I hit reply, body is empty too.
Here are the last part of the headers of one of those messages

Received: (qmail 471 invoked from network); 15 Nov 2007 02:21:07 -0000
Received: from kuiper.ioppublishing.com (193.128.223.163) by rankine.ioppublishing.com with SMTP; 15 Nov 2007 02:21:07 -0000
Message-Id: <17870489.117471195093267563.JavaMail.cws@kuiper.ioppublishing.com>
Errors-To: return-330-129121@bounce.cws.iop.org
Mime-Version: 1.0
Content-Type: multipart/related; boundary="----= Part_1174727903529.1195093267562"
X-Imss-Version: 2.049
X-Imss-Result: Passed
X-Imss-Scaninfo: M:B L:N SM:2
X-Imss-Tmaseresult: TT:1 TS:-4.6526 TC:1F TRN:26 TV:5.0.1023(15546.002)
X-Imss-Scores: Clean:100.00000 C:0 M:0 S:0 R:0
X-Imss-Settings: Baseline:1 C:1 M:1 S:1 R:1 (0.0000 0.0000)

For the record: I am not using any mail plugin and I did a fresh install on my MBP of Leopard
For the record (II): using other email clients (thunderbird) messages are shown properly

I'm experiencing the same problems here - Leopard running since launch day, and Mail has been fine, until yesterday when all my messages turned blank, including those from known Mac users. Reply causes the message to reappear, but only temporarily.

I am having massive screen redraw issues and it is a nightmare. Everything worked fine after the update. Now when I try to open a document in a program, it works once and then won't open anything afterwards. This is a screen redraw issue that is a nightmare. Can't open any document in any program. I open preview, then try to open a document. The document never shows up but the application is running. Then it spreads to other applications. My wifi and slow browser are fixed but this redraw issue is a show stopper. I cannot get any work done whatsoever.

I just ran into this problem. Everything was fine with Mail until today, when messages I received today will not display any content. When I try to view the source, it displays the headers and the first part of the text, but there's no scroll bar in the window so I can't read the rest.

I'm not using Growl, so that's not the problem in my case. I noticed that several older messages, which had displayed fine until now, are also not displaying. I've tried rebuilding the mailboxes, and even restored from an earlier Time Machine backup, but the problem persists. Any other suggestions?

I have the same problem as Ken Doyle after upgrading to 10.5.1 this morning. All buttons at the top of the message frame are inactive, including close, reply, forward, etc. After two to five seconds I get a rotating beach ball, followed by mail crashing a few seconds later. Raising the bottom panel also reveals a blank message. Notably, the beach ball does not appear for received .mac mail, but the screen is still blank and mail crashes after about 10 seconds. Have no bundles. Tried reloading mail from my Leopard Disk to no avail.

Message was edited by: Walton Boyer

Wow. I didn't have a growl bundle but there were a couple of pgp bundles removed them and it's sorted. Thanks.

A few days after my above message, I found I had some old "ToDo" items listed in my iCal sidebar, remaining from OS X 10.4.10. After deleting these items from iCal, Mail started working properly. There must be something in the new interfaces between these Apple applications that results in the behavior we have seen. My experience may not be the only source of intervention, so look at all your old entries in these Apple programs.

I was trying to migrate from Eudora to Mail and got the same problem after importing my Eudora mail. At first all message contents where visible and then bingo the contents where blank.

I don't have Growl bundle mentioned so that wasn't the problem. But relaunching the app did fix the problem. I know that doesn't help some of you.

This happened to me last summer while using OS 10.4, and it just happened again last night, with OS 10.5.2. A large number of emails in my "Sent" folder went blank. When I located the actual .emlx file in my user/library/mail folder, the email opened up in Mail with the content and attachments still in tact.

I believe this may be a bug in Mail, when your mailbox has too many messages in it (I think around 3000 is when things start to get buggy). You have to create a new mailbox folder and move old emails into every few months.

The only way I was able to get those in tact messages back into my mail program was to copy the account folders in your user/library/mail folder onto the desktop or another disk, and then re-import them in Mail (Under "File" select "Import Mailboxes..." ).