fix email source npe #670

Job	Run time
lint / pre-commit	26s
test_mvn / test_mvn (orcid-message-listener)	2m 44s
test_mvn / test_mvn (orcid-activemq)	2m 44s
test_mvn / test_mvn (orcid-api-web)	4m 40s
test_mvn / test_mvn (orcid-internal-api)	3m 14s
test_mvn / test_mvn (orcid-pub-web)	3m 14s
test_mvn / test_mvn (orcid-scheduler-web)	3m 2s
test_mvn / test_mvn (orcid-web)	3m 53s
test_mvn / test_mvn (orcid-utils)	2m 37s
test_mvn / test_mvn (orcid-core)	6m 35s
test_mvn / test_mvn (orcid-persistence)	3m 53s
test_mvn / test_mvn (orcid-api-common)	3m 13s
	40m 15s

Provide feedback