This was a piece of cake: I realised that just scrolling ‘Incoming!’ isn’t particularly attention grabbing, so I ripped a speaker out of a redundant toy [freebie phone extension speakers from a conference I think], and wired it up to one of the digital outputs. When the code identifies the termination character in the message body, it plays the series of tones. This is straight out of the tutorial.

Someone pointed out that the reason that the POP library was occasionally having problems parsing emails being sent by different mail user agents was possibly down to the send format – plain text versus HTML or RTF.