I suggest setting up thunderbird and using the tools>import>importfromanotherthunderbird and then locate and seect the postbox profile. no guarantees, but i have been successful in sharing profiles between the two apps.

Many thanks indeed. It's really a pity that Postbox seems to give up mac support. Regards

Thanks for that info. I'm surprised, as Macs seemed to be their primary customer group. I do know they have done no updates in past 18 months, other than a quick fix to address the MS Oauh2 requirement last month.

I suggest setting up thunderbird and using the tools>import>importfromanotherthunderbird and then locate and seect the postbox profile. no guarantees, but i have been successful in sharing profiles between the two apps.

I tried exactly this and it imported mail folders with the message headers just fine but then I saw all the .

messages were empty. So it had only imported the message headers. What could have gone wrong

I suggested that approach because I don't know Macs and it's supposed to work. Ideally, you would access the profile with Thunderbird not running and copy with the OS's file manager to your profile or wherever you wish, and then click help>troubleshootinginformation, scroll down to 'profiles', click 'about:profiles, click 'create profile' in upper left, click next, enter a short nickname for the profile and then click the browse button to locate and select the copied profile. That process gives you a pure copy.