Am 2017-07-04 09:39, schrieb Joachim Fahrner:

> Could it be that dyne.org name servers have temporary connection
> problems?

When checking dns for tupac2.dyne.org I get 1 error and 3 warnings:

https://mxtoolbox.com/domain/tupac2.dns.org/

E https     dns.org     The Certificate has a name mismatch
E dns     dns.org     Primary Name Server Not Listed At Parent
E dmarc     dns.org     DNS Record not found
E spf     dns.org     DNS Record not found
W dns     dns.org     Bad Glue Detected
W dns     dns.org     Local NS list does not match Parent NS list
W dns     dns.org     Name Servers are on the Same Subnet
W smtp     mail.shockmedia.com     Reverse DNS does not contain the hostname
W smtp     mail.shockmedia.com     Reverse DNS does not match SMTP Banner
W smtp     mail.shockmedia.com     5.639 seconds - Warning on Connection time
W smtp     mail.shockmedia.com     12.520 seconds - Not good! on Transaction 
Time