Invalid HELO name in JavaMail

Question

I\'m getting the following error when using JavaMail to send mails. Its unusual because its been working for sometime until now and no changes have been made.

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Answer 1

Please try enabling transport level security

spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true
spring.mail.properties.mail.smtp.auth=true