I have to configure custom mailbox which in Jira service desk cloud. For this configuration do I have to verify our domain? I have gone through this documents,

https://confluence.atlassian.com/cloud/domain-verification-873871234.html#Domainverification-Verifyyourdomain

https://confluence.atlassian.com/adminjiracloud/configuring-jira-cloud-to-send-emails-on-behalf-of-your-domain-900996548.html

Do i have any another way to configure my email id on Atlassian cloud? because our technical team are not allowing to configure their domain on Atlassian Cloud.

Kindly, provide the solution for this issue ASAP.