mailsetting smtp-rcpt-verification

Microsoft 365 does not accept a blank MAIL FROM:, which is the FortiMail default setting for SMTP recipient verification. Use this command to add an envelope from address to solve the problem.

Syntax

config mailsetting smtp-rcpt-verification

set mail-from-addr <email_address>

end

Variable	Description	Default
mail-from-addr <email_address>	Specify the envelope MAIL FROM: address to use.