Email Configuration reverse DNS failed

Hi All I have added mail server from godaddy updated all MX records and its working fine. But email is not still sending from my wp site. i have checked my mail log it shows the error 421 CMGW Temporarily rejected. Reverse DNS for your ip failed. IB108 Please help me on this someone

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What I could suggest here is using an SMTP for your website rather than plain mail.

That way you will be able to specify an SMTP server with authentication which your emails would be going through. You could for example use your GoDaddy SMTP settings. This would drastically increase the delivery rate of your emails as well compared to using plain PHP mail.

If you are using WordPress for example you could use a plugin. I’ve been using this plugin for a while now and it works very well: Easy WP SMTP

Hope that this helps! Regards, Bobby