Gmail threw these status 4.4.1 delays for one message to cypherpunks at cpunks.org over the last few days before ultimately failing... Diagnostic-Code: smtp; The recipient server did not accept our requests to connect. Learn more at https://support.google.com/mail/answer/7720 [mail.pglaf.org. 2604:3200:0:3:21e:67ff:fe86:ff9c: timed out]