Add-ons
Reviews for Header Tools Improved
37 reviews for this add-on
Rated 4 out of 5 stars
Great add-on. It helped me repair a message that wrongly displayed embedded images at the bottom of the email instead of them being displayed inline in the HTML.
Not sure how it happened, but this add-on allowed me to change easily the email source to fix it.
(In case someone has the same problem as me, more specifically, I changed with it the "Content-Type: multipart/mixed;" in the email source to "Content-Type: multipart/related;". This repaired the email and allowed images to display inline again).
Great tool. I'm sure it will prove very useful for many other things in the future.
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Warning : I may be a bit stupid but it took me some time to use it. I had read the warning on the add-on page about the menu being displayed only in the message pane. And without thinking much, I stupidly thought it meant having an email opened in a new tab.
(i display emails in new tabs by default, not in the message pane below the email folder list).
It does not.
So make sure to open the message pane by pressing F8 first, then right-click in the body of the email in the message page, and you will see the "Header Tools" contextual menu there.
Rated 4 out of 5 stars
Addon did stop working suddenly some time ago (TB 115, HT 4.1).
Neither context menu nor any other menu entry appears in the UI.
Please help - I love it :-)
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Edit:
It seems that the context menu doesn't appear in every mail.
As a workaround I've configured a hotkey which works fine.
Rated 2 out of 5 stars
I tried using Header Tools Improved to "Edit full source" to edit a received Gmail message.
The edited email was synced to Gmail web, but the date was changed to the time I edited the message, not the original received date, which makes it useless.
EDIT: "Edit Message" on Outlook desktop works fine with Gmail without changing the date on Gmail web.
Blame Gmail, not this add-on.
This add-on changes the date by one second, without that Gmail will not accept any changes.
Gmail then changes the date in the web interface to the current time, the date in Thunderbird should not change.
Unfortunately there is nothing I can do about this, sorry.
Rated 5 out of 5 stars
A spectacular add-on!
What is missing:
1) For editing headers, please parse and show all the headers instead of showing only some of them
2) Please allow to specify the font for the full message edit window
3) Looks like the add-on eats/hides leading spaces at least for headers. Maybe it's due to the font. This must not be happening. Spaces must absolutely be preserved.
4) My mail provider adds some huge headers - would be nice to be able to specify the field to cut automatically. I.e. I have this header field: "X-UI-Filterresults". Would be great to select any number of email messages, select this field and click "Delete this field".
5) Please add toolbar items: Edit Headers, Edit Full Message.
Great many thanks for the add-on!
Rated 5 out of 5 stars
I'm using this add-on to fix replay Emails coming without the "in-replay-to" and so does not show under the main thread.
This save me allot of mess in my Inbox.
The author was very responsive to improvement requests.
Rated 3 out of 5 stars
It was a lifesaver for me. Until... it stopped working! The function that I mostly used is to edit the Reference field. TB version 91.4.1 64bit.
The workaround that did the job for me (at least for once) was to move the email to a local folder, do the edit and then move back to the Gmail folder.
Please use the provided support email address for bug reports.
Rated 5 out of 5 stars
A very useful tool - thank you.
I wish I had the option of marking the new copy unread, though.
Rated 5 out of 5 stars
apparently it doesn't work with google imap boxes under thunderbird 91.2.1 (64-Bit)?
developers, please investigate?
Emails get destroid: all header informations are gone after applying changes. The changed header infos appear instead as the email content... while the former content (email text) is gone!
Current workaround for me:
COPY the mail to change from the google imap mailbox to Thunderbirds local folders, change the header or whatever needs changing and copy it back to the google imap area.
Edit 2022
running TB 93. Issue no longer existent.
Can you send a bug report to the support mail address?
I have no problems with Gmail boxes.
Rated 5 out of 5 stars
Thank you so very much for fixing this. I organize my emails by changing the Subject line. I am so glad this add-on is back to working. Easy to use and does the job. Thanks again.
This review is for a previous version of the add-on (3.5). This user has a previous review of this add-on.Rated 5 out of 5 stars
Amazing - thank you Michel - I was waiting for the update to update TB. As I have mentioned before this is the most useful add-on. Is there a site to donate/support the good work that you doing?
This review is for a previous version of the add-on (3.5). This user has 2 previous reviews of this add-on.Rated 5 out of 5 stars
Michel, indeed it took a while, but it was worth it!
Thank you so much for bringing this amazing add-on to TB 78+! Great job!
Rated 5 out of 5 stars
Thanks for updating the old AddOn. Any chance for updating it to Thunderbird 78.*? I really need it's functionality to add missing References header.
This review is for a previous version of the add-on (2.3).Rated 5 out of 5 stars
Essential functionality! Will not upgrade from TB 68 before there is a version of this add-on that is compatible with TB 78...
This review is for a previous version of the add-on (2.3).Rated 5 out of 5 stars
Excellent tool! Please update to 78! You would make me happy!
This review is for a previous version of the add-on (2.3).Rated 5 out of 5 stars
Great! Any chance of upgrade to work in TB 78?
I'm still using TB68 until that.
Rated 5 out of 5 stars
Thank you for the great tool! PLEASE update it to TB 78.*!
This review is for a previous version of the add-on (2.3).Rated 5 out of 5 stars
Perfect Tool! Please update to 78.! That would be great...
This review is for a previous version of the add-on (2.3).Rated 5 out of 5 stars
This works great for my use: changing the subject line to something useable. Please get it to work for 78.5.
This review is for a previous version of the add-on (2.3). This user has a previous review of this add-on.Rated 4 out of 5 stars
This is a "must have" add-on to change the subject of all those anonymous invoices and those fools who use an old subject for a new email. I was avoiding TB 78 but it has crept in - need this updating to work ASAP. Pretty please!
This review is for a previous version of the add-on (2.3).Rated 4 out of 5 stars
This is really a great tool, I love it. Please upgrade to Thunderbird 78.X
This review is for a previous version of the add-on (2.3). This user has a previous review of this add-on.To create your own collections, you must have a Mozilla Add-ons account.
