[horde] Invalid Token for reopen mail as HTML or view source

Angel Parra angel at parranet.com
Mon Jun 22 10:35:44 UTC 2026


Hello,

I can confirm the same error.

With:
   - Horde (horde) 6.0.0-RC7
   - Mail (imp) 7.0.0-RC5

Authentication Settings:
   - Let Horde application handle authentication
   - Auth APP: IMP


The imap server is localhost. Using dovecot-imapd 2.4.1 on a Debian 13.

Then you press "View HTML data in new window." for a mail the emerging  
window has a token error and you are "loged-out".


The error does not happen with:
    - Horde (horde) 6.0.0-RC5 (I do not check on RC6)
    - Mail (imp) 7.0.0-RC3


Thank you

Angel



Quoting lst_hoe02 at kwsoft.de:

> Hello,
>
> we have a test install with Horde 6.0.0-RC7 and matching IMP. It  
> works basically but we are not able to view mail source or the HTML  
> part in a separate browser window. The error is "Invalid Token" and  
> no content is displayed.
> The syslog contains the following:
> 2026-06-22T11:57:40.217804+02:00 schulung HORDE: User xxxxxx is not  
> authorized (Remote host: xx.xx.xx.xx) [pid 204604 on line 428 of  
> "/var/www/horde/vendor/horde/core/lib/Horde/Registry.php"]
>
> So it looks like a problem with authentication token?
>
> Thanks
>
> Andreas
>
>
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