Encoded binaries (e.g. pictures, compressed files, etc.) are forbidden. Such material belongs on a web or FTP site to which a pointer may be posted. Cryptographic signatures (e.g. PGP) may be used where authentication is important and should be as short as possible.
Posts must be readable as plain text. HTML, RTF and similarly formatted messages are prohibited. To see how to make some common newsreaders comply with this, read <http://www.usenet.org.uk/ukpost.html>.
Pointers to commercial or other web sites in signatures are permitted provided the message is on-topic. All signatures should be 4 lines or fewer and preceded by the customary usenet separator "-- " (dash, dash, space) on a line of its own."
uk.telecom.mobile Mobile telephone equipment and networks