The singer left the band last year to focus on "really important work" he was doing involving UFOs and Area 51.
The emails show that DeLonge had been corresponding with Clinton’s campaign chairman John Podesta about their mutual interest in UFOs, something which they have both expressed publicly.
Tom DeLonge has been emailing Clinton's campaign about UFOs
In one email from 2015 DeLonge offers to introduce Podesta to two important individuals to discuss extra-terrestrial life. Delonge writes: “I think you will find them very interesting, as they were principal leadership relating to our sensitive topic.
"Both were in charge of most fragile divisions, as it relates to Classified Science and DOD topics. Other words, these are A-Level officials. Worth our time, and as well the investment to bring all the way out to you.”
In another email from this year, Delonge tells Podesta he is working with a former military official involved in the Roswell incident "When Roswell crashed, they shipped it to the laboratory at Wright Patterson Air Force Base," DeLonge wrote.
"General McCasland was in charge of that exact laboratory up to a couple years ago. He not only knows what I'm trying to achieve, he helped assemble my advisory team. He's a very important man.” It is unclear whether Podesta responded to any of DeLonge’s emails.
Last year DeLonge left Blink-182 to focus on his work regarding UFOs. Speaking to Rolling Stone about his departure he said: “I couldn't tell the band I was working with people in the government.
“That's another big part of this story. People think I want to just put out a novel and make a movie. I have 10 people that I'm working with that are at the highest levels of the Department of Defense and NASA and the military. Big shit, and no one knows this. I'm doing all this stuff already."