links.govdelivery.com/track used by e.g. esrc.ukri.org

The original link, copied from Thunderbird:

http://links.govdelivery.com/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZD0mbWFpbGluZ2lkPTIwMTgwNjIxLjkxNDcxODMxJm1lc3NhZ2VpZD1NREItUFJELUJVTC0yMDE4MDYyMS45MTQ3MTgzMSZkYXRhYmFzZWlkPTEwMDEmc2VyaWFsPTE3MDE4MzA0JmVtYWlsaWQ9dC5tLmJyYWR5QGJyaWdodG9uLmFjLnVrJnVzZXJpZD10Lm0uYnJhZHlAYnJpZ2h0b24uYWMudWsmdGFyZ2V0aWQ9JmZsPSZleHRyYT1NdWx0aXZhcmlhdGVJZD0mJiY=&&&102&&&http://esrc.ukri.org/news-events-and-publications/news/news-items/900-million-future-leaders-investment-will-sustain-the-uk-as-global-home-of-research-talent/?utm_medium=email&utm_source=govdelivery

Result of a redirect, if (without filtering) the link is pasted into Waterfox:

https://esrc.ukri.org/news-events-and-publications/news/news-items/900-million-future-leaders-investment-will-sustain-the-uk-as-global-home-of-research-talent/?utm_medium=email&utm_source=govdelivery

Result, with filtering, if the link is clicked in Thunderbird:

http://links.govdelivery.com/track

Logged, with my 'everyday' profile:

http://links.govdelivery.com/track?utm_medium=email&utm_source=govdelivery http://links.govdelivery.com/track?utm_source=govdelivery utm_[a-zA-Z]*=[^\/|\?|&]*(\/|&(amp;)?)? 25/06/2018, 13:43:22

http://links.govdelivery.com/track?utm_source=govdelivery http://links.govdelivery.com/track? utm_[a-zA-Z]*=[^\/|\?|&]*(\/|&(amp;)?)? 25/06/2018, 13:43:22

Logged, with a clean profile:

http://links.govdelivery.com/track?utm_medium=email&utm_source=govdelivery http://links.govdelivery.com/track?utm_source=govdelivery utm_[a-zA-Z]*=[^\/|\?|&]*(\/|&(amp;)?)? 6/25/2018, 1:49:53 PM

http://links.govdelivery.com/track?utm_source=govdelivery http://links.govdelivery.com/track? utm_[a-zA-Z]*=[^\/|\?|&]*(\/|&(amp;)?)? 6/25/2018, 1:49:53 PM