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I contacted my hosting provider to help me resolve the issue. For those who are seeking answer for similar issue, I suggest to contact their hosting provider. In my case, this was the reply from hostgator (my hosting provider). "The mails were being blocked due to Commtouch blacklisting as the mail patterns were considered suspcious by Commtouch. We ...


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I believe your issue here is SPF. You need to designate your hosting IP as a permitted sender of email for your domain when you have SPF on. You would do this from your domain registrar. Create a new TXT record to add your IP as a permitted sender. TXT mydomain.com "v=spf1 ip4:192.168.0.x mx -all" Where the 192.168.0.x is replaced with your hosting IP. ...


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Your email domain. And you should publish public key via dns DKIM provides a method for validating a domain name identity that is associated with a message through cryptographic authentication - so,in simple words that message from "user@example.com" really send (and wasn't modified in process) by example.com mail server. So - yes, you should have separate ...


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Tl;dr: You should use the header From: address' domain for signing. Here is why. I looked up the headers of signed emails sent by ESPs like MailChimp, SendGrid and the like. Turns out there is no rule of thumb. Some use the From: address' domain, some use the Return Path: domain. Because this is not a very satisfying observation I tried to figure out if it ...



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