<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/xhtml; charset=utf-8">
</head>
<body>
<div style="font-family:sans-serif"><div style="white-space:normal">
<p dir="auto">On 25 Jun 2021, at 2:35, Harvey Leff wrote:</p>
<blockquote style="border-left:2px solid #777; color:#777; margin:0 0 5px; padding-left:5px">
<p dir="auto">It seems that a prime alleged reason for their change is that IMAP does not support 2-Factor authentication. Do any of you experts have knowledge whether that claim is true and really limits security?</p>
</blockquote>
<p dir="auto">I haven't read through all the details of this thread, but MailMate supports OAuth2 for Office365 accounts. It only works in test releases of MailMate since the feature is quite new for Office365 itself (for third party email clients).</p>
<p dir="auto">On a general note, 2FA is great for security, but OAuth2 itself over IMAP <strong>for a desktop email client</strong> isn't as great as it might look like at first. It requires MailMate to be registered with Microsoft (like it is for Gmail at Google). They can then put up all kinds of requirements and even code audits. If MailMate should ever misbehave then they can block its usage similar to how Apple can throw apps out of its app store. This might all sound great, but in practice any other application can pretend to be MailMate since there's no way for MailMate to hide its “identity”. For example, it would also be easy to make MailMate masquerade as Thunderbird even if MailMate had never been registered at Microsoft (or Google).</p>
<p dir="auto">On a related note, MailMate doesn't work with Yahoo OAuth2 since there appears to be no official way to register MailMate for IMAP/SMTP. I believe it works with Thunderbird because they apparently were somehow registered “manually”. It seems Apple also has something similar for iCloud, but I don't think any third party email clients are allowed access to that which is why application specific passwords are needed to make it work (contrary to Apple Mail itself).</p>
<p dir="auto">Phew...</p>
<p dir="auto">--<br>
Benny</p>
</div></div>
</body>
</html>