We have been successfully using the contact.checksum link in renewal reminder emails for our Wordpress site. The link in the received email typically looks like:
However, one user has different behavior when opening the email on a webmail client (it will be OK when reading the email in another client). The webmail client is with a local ISP, cox.net. The link has an extra path in the URL, e.g.
This seems to be CLEARLY the fault of the ISP. The SAME email, when forwarded to another mail provider is correct. The user with this problem has talked to their ISP (cox.net) and they cannot provide an answer.
I'm just posting to see if anyone has encountered something like this with either cox.net or any other ISP.