macOS Mail Message Corruption

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macOS Mail Message Corruption

Roger Caldwell-2
In the past week, I have been experiencing corruption of mail messages in macOS Sierra Mail. The machine in question is a Late 2015, 27” iMac running 10.12.1. What will happen is that a mail message gets “merged” with another. It will have the header of one message with all or part of the body of another. Also in the body is part of the header into. It just happened with an email that was sent to an iCloud alias. When I view the messages on my iPhone 6, or iPad Pro everything is fine. But then when I view it in Mail on the desktop, problems begin. 

I have tried rebuilding the mailboxes with no effect. About the only way to then salvage the message is to use Thunderbird to make a copy of the message to another folder. Then delete the corrupted message and move the copy back to the Inbox.

Anyone else seen this behavior? Other things to try to resolve?

============================
Regards,

Roger Caldwell




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Re: macOS Mail Message Corruption

Jeff Fay
I’ve seen it several times in my Apple Mail (under Sierra). The message header is from a completely different message.

I haven’t done anything but think about how to resolve it.

Jeff


On Nov 29, 2016, at 1:35 PM, Roger Caldwell <[hidden email]> wrote:

In the past week, I have been experiencing corruption of mail messages in macOS Sierra Mail. The machine in question is a Late 2015, 27” iMac running 10.12.1. What will happen is that a mail message gets “merged” with another. It will have the header of one message with all or part of the body of another. Also in the body is part of the header into. It just happened with an email that was sent to an iCloud alias. When I view the messages on my iPhone 6, or iPad Pro everything is fine. But then when I view it in Mail on the desktop, problems begin. 

I have tried rebuilding the mailboxes with no effect. About the only way to then salvage the message is to use Thunderbird to make a copy of the message to another folder. Then delete the corrupted message and move the copy back to the Inbox.

Anyone else seen this behavior? Other things to try to resolve?

============================
Regards,

Roger Caldwell



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__________________________

Jeff Fay
Media Specialist
Cooperative Extension Service
University of Alaska Fairbanks
P.O. Box 756180
Fairbanks, Alaska 99775-6180

phone (907) 474-5349
fax (907) 474-2631
[hidden email]
Skype ID: aksnocat
iChat ID (AIM): alaskasnocat
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http://www.uaf.edu/ces
----
You don't stop laughing because you grow old. You grow old because you stop laughing.




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Re: macOS Mail Message Corruption

Paul Chernoff
I have seen this problem before. You need to delete the envelope files that hold the indexes, they are corrupt and rebuilding won't fix them. Quit from Mail and go to ~/Library/Mail/V2/MailData and remove the Envelope files. Then start Mail.

PAUL CHERNOFF
Director of Information Technology
W. 202.862.3504 
1828 L Street, NW, Suite 200, Washington, DC 20036


We are a WBENC Certified WBE/WOSB.

On Tue, Nov 29, 2016 at 5:39 PM, <[hidden email]> wrote:
I’ve seen it several times in my Apple Mail (under Sierra). The message header is from a completely different message.

I haven’t done anything but think about how to resolve it.

Jeff


On Nov 29, 2016, at 1:35 PM, Roger Caldwell <[hidden email]> wrote:

In the past week, I have been experiencing corruption of mail messages in macOS Sierra Mail. The machine in question is a Late 2015, 27” iMac running 10.12.1. What will happen is that a mail message gets “merged” with another. It will have the header of one message with all or part of the body of another. Also in the body is part of the header into. It just happened with an email that was sent to an iCloud alias. When I view the messages on my iPhone 6, or iPad Pro everything is fine. But then when I view it in Mail on the desktop, problems begin. 

I have tried rebuilding the mailboxes with no effect. About the only way to then salvage the message is to use Thunderbird to make a copy of the message to another folder. Then delete the corrupted message and move the copy back to the Inbox.

Anyone else seen this behavior? Other things to try to resolve?

============================
Regards,

Roger Caldwell



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__________________________

Jeff Fay
Media Specialist
Cooperative Extension Service
University of Alaska Fairbanks
P.O. Box 756180
Fairbanks, Alaska 99775-6180

phone <a href="tel:%28907%29%20474-5349" value="+19074745349" target="_blank">(907) 474-5349
fax <a href="tel:%28907%29%20474-2631" value="+19074742631" target="_blank">(907) 474-2631
[hidden email]
Skype ID: aksnocat
iChat ID (AIM): alaskasnocat
Yahoo Messenger: aksnocat
http://www.uaf.edu/ces
----
You don't stop laughing because you grow old. You grow old because you stop laughing.




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Re: macOS Mail Message Corruption

Jerome King-2
Is it V4 instead of V2?  And which of the envelope files?

My V2 folder only has Accounts.plist as an item

Jerry
On Dec 5, 2016, at 12:58 PM, Paul Chernoff <[hidden email]> wrote:

I have seen this problem before. You need to delete the envelope files that hold the indexes, they are corrupt and rebuilding won't fix them. Quit from Mail and go to ~/Library/Mail/V2/MailData and remove the Envelope files. Then start Mail.





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Re: macOS Mail Message Corruption

Paul Chernoff
Since I am not running macOS (my home iMac is too old and my work iMac needs compatibility with CS6) I can't answer the specifics. I guess that V4 has replaced V2, makes sense if Apple has changed the Mail structure. And the envelope files could have been replaced by something else to hold the indexes. I did a little searching but found nothing about macOS 12.

PAUL CHERNOFF
Director of Information Technology
W. 202.862.3504 
1828 L Street, NW, Suite 200, Washington, DC 20036


We are a WBENC Certified WBE/WOSB.

On Mon, Dec 5, 2016 at 1:18 PM, Jerome King <[hidden email]> wrote:
Is it V4 instead of V2?  And which of the envelope files?

My V2 folder only has Accounts.plist as an item

Jerry
On Dec 5, 2016, at 12:58 PM, Paul Chernoff <[hidden email]> wrote:

I have seen this problem before. You need to delete the envelope files that hold the indexes, they are corrupt and rebuilding won't fix them. Quit from Mail and go to ~/Library/Mail/V2/MailData and remove the Envelope files. Then start Mail.





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RE: macOS Mail Message Corruption

Jerome King-2
In reply to this post by Roger Caldwell-2
I contacted Paul when I looked at his comments and he confirmed that the appropriate folder is probably V4, not V2.

I wanted to share his conclusion with the list as he and I were corresponding outside the list. I needed to share some images which required being off list

I don't have the OP's problem but you might

He is referring to ~Library / Mail / V4 / MailData

Jerry

Begin forwarded message:

From: Paul Chernoff <[hidden email]>

I would remove the Envelope Index files. This looks identical to the envelope files in my Mail folder under V2. There are ways to do this at the command line and a program called Vacuum Mail might do this more elegantly, but I don't know if it has been updated for macOS 12.

PAUL CHERNOFF
Director of Information Technology
W. 202.862.3504 
1828 L Street, NW, Suite 200, Washington, DC 20036





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Re: macOS Mail Message Corruption

Fritz Mills
In reply to this post by Jerome King-2

On Dec 5, 2016, at 12:18 PM, Jerome King <[hidden email]> wrote:

Is it V4 instead of V2?  And which of the envelope files?

My V2 folder only has Accounts.plist as an item

Jerry
On Dec 5, 2016, at 12:58 PM, Paul Chernoff <[hidden email]> wrote:

I have seen this problem before. You need to delete the envelope files that hold the indexes, they are corrupt and rebuilding won't fix them. Quit from Mail and go to ~/Library/Mail/V2/MailData and remove the Envelope files. Then start Mail.




That’s what worked through Yosemite, and I have had to do that from time to time. I’m now on El Cap and found that my V2 folder only contains the Accounts.plist item as well. I don’t have a V4 folder, but I do have a V3 folder. In that folder is the MailData folder, and in that folder are the envelope files. There are three: Envelope Index, Envelope Index-shm, and Envelope Index-wal. Those are the same names as the files that used to be in the V2 MailData folder. So if you have a V3 folder, look in there or if you have a V4 folder, look in there. When you delete those files (at least in Yosemite and earlier), the next time you open MaIl, it says it has to import all your mail and depending on how many emails you have, that can take some time.



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Re: macOS Mail Message Corruption

@lbutlr
In reply to this post by Jerome King-2
On 12/5/16 11:18 AM, Jerome King wrote:
> Is it V4 instead of V2?  And which of the envelope files?

V4 is the folder in Sierra. V2 for many versions before that.

> My V2 folder only has Accounts.plist as an item

Left from El Capitan, I'd assume.




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Re: macOS Mail Message Corruption

Al Varnell
On Dec 5, 2016, at 3:11 PM, "@lbutlr"  wrote:
> V2 for many versions before that.

No, as has already been mentioned, it migrated to V3 in El Capitan, then V4 in Sierra.

Sent from Janet's iPad

-Al-


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