Mail App Icloud Client Host Rejected Access Denied

• Icloud Smtp Client Host Rejected Access Denied
• Mail App Icloud Client Host Rejected Access Denied

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Feb 08, 2017 If this is disabled in the configuration file, all the users will receive “ 554 5.7.1: Relay access denied “. Smtpdrecipientrestrictions = permitsaslauthenticated. Such failures in mail server capabilities often happen as a result of mail software upgrades or operating system upgrades. Note: iCloud Mail uses the IMAP and SMTP standards supported by most modern email apps. ICloud does not support POP. 2 Factor Authentication in iCloud Mail: Two factor authentication uses an extra device, like a mobile phone to provide an additional layer of security when you access your account.

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Question

I’ve spent days trying to figure this out and I am stumped. Got postfix up and working, both sending and receiving, under a test domain name (test.mydomain.com). Then moved ‘mydomain.com’ to DO’s nameservers and reconfigured Postfix to use 'mydomain.com’ instead, and now I can’t send email. Receiving works fine. Below is the output I get from /var/log/mail.log:

Here is the output from postconf -n:

Any clues as to what is causing the issue? I should mention that ’user2@mydomain.com’ is an alias created using PostfixAdmin.

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Icloud Smtp Client Host Rejected Access Denied

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Mail App Icloud Client Host Rejected Access Denied

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