Is there a way to set the DNS TTL to something other than 86400?  That's a terribly long time.  I'm waiting for an MX record to propagate and was surprised to see the TTL is so high.  I'd like to avoid long name record propagation in the future.

When I transferred my domain to shopify, my existing MX records were lost and email to my domain bounced for about 24 hours until I noticed.Is it possible to obtain a log of all undeliverable messages sent during that period of time?  I'd like to kno...