I have found he cause of the problem: My security software McAfee VirusScan Enterprise 8.7i stopped outgoing mails from calibre as prevention against mass mailing worms. I added
calibre.exe to the programs to exclude in McAfee and now the e-mailing works thru GMAIL, not yet thru my regular address but that will be because of that particular e-mail server, still working on that.
Thanks for the help!
WWilf
