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Its all working. I went through few websites that check dmarc dkim and mx records to figure out.
https://mxtoolbox.com/SuperTool.aspx?action=mx%3aMyDomain&run=toolpage Gave me fail Then i opened port 25 in firewall in lightsail Re -ran , it worked
My outgoing /incoming works local and outside now. pots 25 , 465 and 587 added to firewall.
only warning is MX LOOKUP SMTP Banner Check Reverse DNS does not match SMTP Banner
i used these sites to sort out dmarc dkim and mx entries and mx lookup https://easydmarc.com/tools/dkim-record-generator
I wonder why lightsail DNZ zone do not have PTR entry
Hello Alexk!
I can see that you have resolved the issues with your MX records, DMARC and DKIM since you posted this question.
For the question about how to add a PTR record, this is something that you need to request AWS to add. Please see the following documentation regarding how to request this and the prerequisites: https://lightsail.aws.amazon.com/ls/docs/en_us/articles/amazon-lightsail-configuring-reverse-dns
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