why do emails disappear from inbox after being read

In a February 15 letter to the court, Assistant US Attorney Nicolas Roos described Bankman-Fried as 'a technologically sophisticated person with both the ability and the inclination to seek workarounds of more narrowly drawn bail conditions.'

His lawyers said that Bankman-Fried was only watching the Super Bowl and other NFL games through an international subscription he purchased in the Bahamas, but Kaplan still ordered him to stop using a VPN. On February 13, prosecutors raised concerns about Bankman-Fried's use of a VPN, which masks a user's web-browsing activity and location. He added concerns that Bankman-Fried could still figure out a way to conceal communications, saying: 'I've read all the spy novels.'

Kaplan then banned him from using any apps which encrypt or auto-delete messages. In late January, prosecutors alleged that Bankman-Fried may have engaged in witness tampering after he reached out to FTX employees via the encrypted messaging app Signal. US District Judge Lewis Kaplan has warned Bankman-Fried several times over his use of technology while under house arrest at his parents' home in Palo Alto, California. The letter, signed by Bankman-Fried's attorney Christian Everdell and viewed by Insider, said lawyers agreed to the appointment of 'an independent technical expert, paid for by the defense, to advise the Court on technical issues concerning Mr. Lawyers for the FTX cofounder Sam Bankman-Fried wrote to the judge presiding over his criminal case on Tuesday, agreeing to pay for an expert to help explain virtual private networks (VPNs) and disappearing messages.

Why do emails disappear from inbox after being read