Open the sequencer page. At the top left corner you will see a label which says "Export".
The red button next to the label (with the pinkish waveforms) will allow you to export the current pattern as a wave file, which can be opened by any sound editing software, and used by any DAW.
You will also be able to email it without any problem.
The only proviso might be the size of the wave file. If it's a really big file (if your beat is maybe 16 or 20 bars for example) it might be worthwhile compressing it into a zip file before emailing.