My actions: I added the Thunderbird program to the Windows firewall exceptions. I turned off the firewall. I disabled the antivirus program. I uninstalled the program and reinstalled it. Nothing worked. 
A colleague can open these files, but she has version 128.11.1esr - which I cannot install without creating a new profile. At the moment I have 4 profiles, so it would be problematic, especially since I don't know for how long it would help. 

Hello, For some time now (maybe since the last update), I haven't been able to open an eml file saved on another disk in the local network. These are important messages saved by various network users. I can open these documents with another email program. My actions: I added the Thunderbird program to the Windows firewall exceptions. I turned off the firewall. I disabled the antivirus program. I uninstalled the program and reinstalled it. Nothing worked. A colleague can open these files, but she has version 128.11.1esr - which I cannot install without creating a new profile. At the moment I have 4 profiles, so it would be problematic, especially since I don't know for how long it would help. Please help. Best regards. Nina tel. +48604630860, ksiegowosc@cdpartner.pl PS. I have two e-mail accounts with long history of messeging. Last summer the Thunderbird started to hang. I divided my 1 profile into 4 - two active and two archives. Now they are working.