Bast way to block hotmail/outlook/live email addresses from registration

boyjahq
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1 year 10 months ago #329566 by boyjahq

Replied by boyjahq on topic Bast way to block hotmail/outlook/live email addresses from registration

Email source code shows

Content-Type: text/html; charset=UTF-8

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krileon
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1 year 10 months ago #329569 by krileon

Replied by krileon on topic Bast way to block hotmail/outlook/live email addresses from registration

My guess is there is potentially broken HTML in the email. Many email providers will attempt to fix the broken HTML, but aren't always successful in doing so. Please provide the full language string for your email and will see if there's any formatting problems in it. You can typically easily confirm this by reverting back to the default language key YOUR_REGISTRATION_IS_PENDING_APPROVAL_MESSAGE and seeing if it displays fine in hotmail.

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boyjahq
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1 year 10 months ago #329577 by boyjahq

Replied by boyjahq on topic Bast way to block hotmail/outlook/live email addresses from registration

The problem seems to be associated with Content-Transfer-Encoding. The one causing these problems seems to be
Content-Transfer-Encoding: quoted-printable.

Most email services are good at processing out the quoted-printable codes, but Microsoft-based emails are apparently maintaining a kind of legacy approach that does not correct for these. The internet is FULL of complaints about this issue. Even though PHPMailer is set to 8bit by default, it appears to be changed to quoted-printable by mail servers such as Microsoft. The result is that any line that of text that exceeds 76 characters gets something like

"=
=3D=0A="

inserted at the 76th character spot.

After days of testing and research, I have discovered that I can solve this issue if I change the following setting in CBPHPMailer.php from "8bit" to "base64":

/**
     * The message encoding.
     * Options: "8bit", "7bit", "binary", "base64", and "quoted-printable".
     * @var string
     */
    public $Encoding = 'base64';

Set to base64, properly formatted emails are delivered to hotmail and outlook email users.

Does that make sense? And more importantly, will our modified message encoding setting be removed anytime we update Community Builder? If so, is there some way that we can keep it in place?

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krileon
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1 year 10 months ago #329581 by krileon

Replied by krileon on topic Bast way to block hotmail/outlook/live email addresses from registration

Does that make sense?

No idea, I'm not an expert when it comes to mail servers.

And more importantly, will our modified message encoding setting be removed anytime we update Community Builder?

Yes, of course. Any modifications to core code will be lost on update.

If so, is there some way that we can keep it in place?

Will review needing to add a parameter to let you select the encoding. For now I suggest making a note to reapply your change after an update.

forge.joomlapolis.com/issues/8964

Since this is specifically a hotmail problem we might be able to just apply the encoding change automatically internally, but will also explore adding a parameter to change the encoding.

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boyjahq
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1 year 10 months ago #329654 by boyjahq

Replied by boyjahq on topic Bast way to block hotmail/outlook/live email addresses from registration

Since this is specifically a hotmail problem...

Technically, it is not only hotmail. We can see this problem with all Microsoft related email accounts: hotmail, outlook and all "live" email addresses (live.com, live.jp, live.nl, live.co.uk, etc.). We have also seen similar issues with emails from certain university email accounts where we can see in the headers that they are using Microsoft email servers but they are associated with the domain name of the university.

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boyjahq
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1 year 9 months ago #329839 by boyjahq

Replied by boyjahq on topic Bast way to block hotmail/outlook/live email addresses from registration

What mailer setting does Joomlapolis use on the website? PHP Mail, sendmail or SMTP?

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