I would like to know more about web forms, how safe and secure it is, how it works, through which servers are they sent to which institution etc.
I ask this because I have been puzzling for a while about a form from a customer that no longer arrives since the mail server has changed from antagonist to a remote server (someone has set up himself) on which kerio-connect is installed. Completely protected with SPF DKIM and DMARC, but not made suitable for ipv6. I could see on internet.nl. But it does not seem like that.
The person whose server is said that smtp connection should be made and that ipv6 does not matter. If you do not enter smtp data, but 'local' it will be fine but not with them.
I have entered all smtp data correctly, from-address with domain name, but still I can not. He also tried everything but no success. I recently came across another forum, English, I hear about exactly the same problem! And if you google it seems that several (exchange) mail servers are set up so that outcomes of forms no longer arrive. I do understand that email traffic must be better protected, spoofing, spam and stuff, but what exactly is it why it does not arrive anymore. I searched for information but I still do not understand how it works.
I really hope that someone would write a blog about it, with how that all works and how those problems arise and especially how you can solve them!
I didn't find the right solution from the internet.
Motion graphics animation company
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