The messages I've had say that a message could not be delivered for up to 8 hours. They were from a subsystem Daemon but today I sent an e-mail to my daughter and she telephoned to say she could not send me a reply as they were being bounced back by this Daemon thing. I've searched on Microsoft but I don't understand the articles. Any help would be appreciated.
Oh thank you Graham! Yes, that is the spelling. Unfortunately the first two of these mails I deleted as I didn't know what they were. This time, when I sent a message to my daughter, as I have done many times, she tried to reply and she got the message as mentioned above. Since then she's sent me another reply which did come through OK.