[orca-list] Seamonkey and Orca issues

["Mgr. Janusz Chmiel" <ernesta tiscali cz>]

Dear users and developers,
    I have started to use Ubuntu Mate 15.04 with latest available 
updates from repositories. I Am experiencing issues with long list of 
delivered E-mails. I have more than 18000 messages     inside my global 
incoming mail folder. I use latest stable version of Seamonkey. My 
problem is, that when I set The radio button to display all messages, 
Orca will stop  respond. This happen when I start Seamonkey and when 
Ipress CTRL+number 2 on The upper part of my keyboard. Problem is not 
occurring, when i set radio button to displayonly unread messages.
Very interesting aspect of this problem is, that Orca speak Seamonkey in 
accessible. When I type Orca --replace from Run dialog window, Orca will 
start to respond normally on all apps, excepts Seamonkey communication.
Itis possible to repair Orca, or it is The matter of slow at-spi 
libraries, so Orca is helpless to face this issue?
I must archive my E-mails many years backward, so this is The reason, 
why I have so many mails inside incoming folder.
Thank You very much for Yours answer.