PowerShell command to bypass Office 365 spam filter

Warning: I haven't tried this.

There's some debate over on the Office365 forum about regular expressions in HTML emails. The Microsoft support guy said, "Based on my experience, rules cannot filter texts in the html of emails."

However.

If the text and the HTML of the message are the same, you should be able to use a regular expression to detect links that don't match. Something like this from regexplib might be a starting point for something that might help:

<a[\s]+[^>]*?href[\s]?=[\s\"\']+(.*?)[\"\']+.*?>([^<]+|.*?)?<\/a>

Sorry I don't have anything better, but it was too long for a comment. Hopefully, someone else has something better for you.

OK I'm not totally happy with this, but I got it working. I feel like there's a more straightforward way though, but I can't figure it out.

After further research, I found that virtual_alias_maps is run before anything in transport_maps, which is why I thought it was being ignored. So if you have addresses being rewritten then whatever the output from the virtual alias rewrites needs to match what you're going to feed into transport_maps. Then my transport_maps hash looks like this:

email@example.com        smtp:example-com.mail.protection.outlook.com
@example.com  :
*       :

This would cause email sent to email@example.com to be relayed to Office 365, but everything else gets delivered locally.

It works, but I still feel like there's a better way to handle this.