Fix to prevent magic login links from being prematurely invalidated by security scanners

Monday, 14 April 11:10 UTC
Bugfix Changelog

We had reports from a customer that some of their subscribers were receiving a 'Link Already Used' error when trying to log in and manage their subscription preferences.

After some diagnosis, we determined that certain security measures in place on the recipient mail server were following the links in the email and prematurely invalidating the single-use link before the subscriber had clicked on it themselves.

We have now released a patch that helps prevent links from being invalidated when inspected by a security scanner.

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Robert Rawlins