javamail mark gmail message as read

Question

Note: added after answer: Thanks.. Yeah I had tried the Flag.SEEN to true and saveChanges.. I also had read getContent marks it read. I tried using it in the for statement that

Answer 1

One liner that will do it WITHOUT downloading the entire message:

single message:

folder.setFlags(new Message[] {message}, new Flags(Flags.Flag.SEEN), true);

all messages:

folder.setFlags(messages, new Flags(Flags.Flag.SEEN), true);

Other methods of calling getContent() or creating a copy with new MimeMessage(original) cause the client to download the entire message, and creates a huge performance hit.

Note that the inbox must be opened for READ_WRITE:

folder.open(Folder.READ_WRITE);