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This seems to happen randomly. I changed it to top reply and place signature immediately below my reply. Any ideas on why it truncates my response and forward messages? And it does not seem to do it consistently.

Thunderbird 3.1.9 is running on Windows 7 (x64). This same behavior is exhibited on 3 different computers.

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From Reply message truncated Thunderbird 3.0 :

Backup your Thunderbird Profile then compact all folders.

If it doesn't resolve the problem then do the following :

Close Thunderbird. Find and delete all of the files with the .msf file extension in profile folder/Mail, including your Folders (especially if you are using the global inbox). You must have How to show hidden files and folders and if you are using Windows you also need to set "hide extensions for known file types" off (just below View Hidden). These are your mail summary files and do not hold any messages themselves. They will be rebuilt the next time you open each folder in Thunderbird. Compact all your folders when you have completed this.

If this doesn't help, please let me know your Thunderbird version and operating system.

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updated main post with this info – Tone Apr 16 '11 at 10:35
I understand that none of the above helped in any way ? See also the solution at the end of how do i show full original message in reply. – harrymc Apr 16 '11 at 13:09

I think this is the gmail-like "quote only what is selected" feature, not a problem. Be sure to not have anything selected before replying, if you want to quote everything.

Another option is that there is the text "--" somewhere in the message, which could be interpreted as "beginning of a signature": by default, Thunderbird do not quote anything after that. So the workaround in this case is to "select all" and the reply. In this case Thunderbird will use the feature described in the previous paragraph and quote everything, even if happens after a signature.

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Google shows this question asked hundreds of times. There are many work-arounds and bug reports on this.

However it isn't a bug. It's a feature. The feature is intended to truncate unwanted signatures from Usenet (forum) posts. The signature is signified by a double hyphen and a space on a line by itself "-- ".

You can turn this feature off in Thunderbird's configuration by:

Advance -> Config Editor -> [I'll be careful] -> (search for) mail.strip_sig_on_reply -> [toggle it to false].

By the way, I spend about an hour searching for how to do this on every Thunderbird install. Hopefully this definitive answer will save Thunderbird users time.

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