Per [1], it appears that Mailgun has an internal limit of 1000 characters per URL currently. We suggest 2083 as a bare minimum as set by Internet Explorer [2]; modern browsers have much higher limits.
Our URLs can include some "view state" that's helpful to include as context. These can get quite long. Without Mailgun URL rewriting, our customers are seeing inconsistent links (some with the tracking domain, some without), and that's occasionally preventing them from clicking on links due to Outlook SafeLinks protection.
Tim Vasil
Per [1], it appears that Mailgun has an internal limit of 1000 characters per URL currently. We suggest 2083 as a bare minimum as set by Internet Explorer [2]; modern browsers have much higher limits.
Our URLs can include some "view state" that's helpful to include as context. These can get quite long. Without Mailgun URL rewriting, our customers are seeing inconsistent links (some with the tracking domain, some without), and that's occasionally preventing them from clicking on links due to Outlook SafeLinks protection.
[1] https://www.mailgun.com/blog/product/weekly-product-update-increased-character-limit-for-link-rewriting-and-account-management-improvements/
[2] https://support.microsoft.com/en-us/topic/maximum-url-length-is-2-083-characters-in-internet-explorer-174e7c8a-6666-f4e0-6fd6-908b53c12246