I have installed mamp pro 5.5 on my osx 10.14.6
When I try to send email i says me
Our system has detected that 550-5.7.1 this message does not meet IPv6 sending guidelines"
When I disable ipv6 it says me
550-5.7.1 This message does not have authentication information or fails to pass 550-5.7.1 authentication checks.
What should I do to use php mail function on my local?