This was my first inkling that it might be VPN related. Some time later, I connected to my VPN to work on a issue with one of my servers. Everything downloaded I could read my mail. After rebooting, Mail.app stayed running. One suggestion said to disable all your email accounts via System Preferences | Internet Accounts and reboot. They involved removing the contents of ~/Library/Mail and ~/Library/Containers/. I tried various suggestions found while searching for a solution. Delete and start againĭon’t do what I outline in this section. I have used Thunderbird in the past, but I prefer the Mail.app interface. In the meantime, I got Thunderbird installed and running.
I concluded Mail.app got messed up / confused while I repeatedly connected to different networks via different ports. Once the cause was discovered and fixed, I connected to my VPN, via TunnelBlick.
During that time, I was connecting into my network via ethernet cable, jumping back onto the WIFI, then back into my network, all in an attempt to fix the DNS issues. This DNS problem took about an hour to resolve.
This allowed the MacBook Pro to have a workable WIFI connection. After removing those entries, the MacBook Pro started using the name servers (i.e. My System Preference | Network | Wi-Fi | Advanced | DNS settings had my internal DNS servers hard coded. I spent a lot of time experimenting with nf on my DHCPD server. I thought this name server discrepancy was DHCP related because my MacBook Air did worked just fine. The Pro should have had the same DNS servers as the Air. Those servers could not be reached when on WIFI because of the firewall. The Air had 8.8.8.8 & 8.8.4.4 (Google DNS) but my Pro had my internal DNS servers (the ones I run here at home, behind the firewall, and accessible only via VPN). I noticed the DNS servers on the two MacBooks differed. It could get connected to WIFI but could not go anywhere, not Google, not my VPN, nothing. As an aside, I was running several different SSIDs, mostly silly names for laughs.Īfter the SSID consolidation, my MacBook Air would work fine, but my MacBook Pro would not. This one arose when I moved all my wireless access points onto the same SSID.
The full dump of the crash has been sent to Apple, multiple times. When running Mail.app, it would crash within 5-10 seconds. This particular edge case involved the following: you cable modem or your U-verse modem), don’t forget to forward ports 1194 (TCP+UDP) and 443 (TCP) to your VPN router.This particular situation caused OXS Mail.app to crash when using a VPN. If you are using another router as your internet gateway (e.g.