JMAP endpoint auto discovery

[chibenwa]

Input email address first. eg btellier@liangora.com

From email addres do DNS lookup to catch SRV records to get the JMAP URL.

Use this to pre-configure the JMAP URL

If no SRV record is found, prompt for the JMAP URL

EG

_jmap._tcp.linagora.com SRV 10800 0 1 443 jmap.linagora.com

[chibenwa]

$ dig srv _jmap._tcp.linagora.com
;; ...
_jmap._tcp.linagora.com. 300	IN	SRV	0 1 443 jmap.linagora.com.

[hoangdat]

Flutter: https://pub.dev/packages/multicast_dns