mail sent to gmail not arriving

merten

bladudflies I am also experiencing gmail destined mail not arriving. Though i am not getting the 'mail undeliverable' notice as you mention. I tested sending from the webmail environment, this worked. So i suspect my PHP mail solution is holding me back for gmail delivery ( and perhaps more services ). Any mail targeted to an opal account gets delivered normally.

Have you found anything else regarding the issue?

sean

merten i've moved this to a new topic since it is unrelated to the DE mail outage.

If you are having delivery issues for mail sent from a PHP app then please email support and let us know the app and site related to the issue.

bladudflies

merten all i have discovered is that it is not happening to new emails. It is only happening to existing (pre-outage) email threads. So my workaround is to copy the email thread into a new email and hit send - once I have done this then I am able to respond to this new thread without any issue. I am going to see if this continues to happen for another week or so before contacting support.

merten

I discussed the topic of bouncing delivery to i.e. gmail with Sean. He had a breakthrough suggestion after inspecting some full e-mail headers of bouncing mails. When using php's mail function, without any additional headers the mail is marked to be sent from {account}@opal5.opalstack.com

The mailserver is not able to sign the mail with the domain's DKIM etc since the account and domain are not related directly. But when using the -f additional parameter ( https://www.php.net/manual/en/function.mail.php ), the mail does get signed when you enforce your own domains mail address ( i.e. noreply@mydomain.com ). Beware that the parameter flag is "-fnoreply@mydomain.com" without any space after -f.

So far, in my early rollout, i've witnessed instant delivery, and a long lasting todo/wishlist item solved.
Hope this helps anybody, thanks Sean!

bladudflies

merten thanks merten but I don't understand how to do that practically. I'll look at the links. Thanks!

jonadelman

merten, Thanks for the info. Can anyone give the steps of where to do this. One of my e-mails is having this problem and I am not sure how to implement merten's solution.

nick

jonadelman Depending on who manages the DNS for your domain, you can follow the appropriate guide we have here https://docs.opalstack.com/user-guide/domains/#using-external-name-servers or here https://docs.opalstack.com/user-guide/email/#for-domains-using-opalstack-name-servers

Hope this helps.

merten

Hi Jona, the above mentioned comes down to this syntax in php: mail($to, $subject, $body, $headers, '-f' . $domainBasedMailAddress);

Where the var $domainBasedMailAddress is for example 'info@mydomain.com' when the script is executed from mydomain.com. This matches the two together, dont forget the -f flag and without a space as mentioned in the early posts.

Good luck