The BBC bosses refused the opportunity to transfer the Royal Wedding. They claimed that not enough people would see the event.
The e-mail on Sunday revealed that Eugenie's father, Prince Andrew, was trying to sign a contract with the national television network.
But after the secret meetings with BBC, he was told that it would not happen.
A source told the Sunday mail: "From the beginning, the order from the top was that Eugenie's wedding must be televised.
"The BBC was approached because it has a special relationship with Buckingham Palace and a formula that works.
"But they refused, because they do not believe enough people get involved and that York's support is not enough.
"The feeling in the Palace is that the BBC dropped the ball.
"At the end of the day there will be a huge royal wedding where all the older members of the royal family will be present.
"But nobody wants to take the risk and spend the money it would cost to air it."
sky also plans to show no more than short excerpts from the marriage.
But ITV can come to the rescue by assuring a complete program of coverage.
Eugenie, 28, and her fiancée Jack Brooksbank, 32, announced their plans to form a bond in January.
The elaborate wedding will cost the British taxpayer in the opinion of Royal expert Hamish Shephard with 2.7 million pounds expensive.
He said security would cost £ 2 million, floristry £ 100,000, music £ 25,000 and the dress £ 200,000.
Mr. Shephard says Stella McCartney, who designed Meghan Markle's wedding dress, is likely to claim Eugenie's eye-catching dress.
The couple, who has been together since 2010, will marry in St. George's Chapel – the same place as Prince Harry and Meghan Markle.
After the wedding, there will be a reception on the grounds of Windsor, which is a holiday and festival day.
Mr. Shephard told Mail Online, "With Meghan's and Harry's wedding being the most-watched wedding in history, a second royal wedding in Windsor will surely attract another global audience."
He added, "Since Eugenie and Jack are both attending Harry and Meghan's wedding at Windsor Castle earlier this year, they will certainly want to mark their day off to celebrate their individuality and demonstrate their personality during the wedding details ,
"After Meghan broke the tradition by walking down the aisle with a gospel choir and her now infamous preacher, Eugenie will be pleased to have the freedom to do exactly what she wants.
"While Meghan's and Harry's wedding was an international spectacle, Eugenie and Jack will have a more leisurely opportunity to celebrate the best of Britain, but with an equally high-profile guest list."