If you post some text that includes the text anyone@mailserver, the forum software will remove it and ask you to use a PM instead. This is a simple security feature, to prevent spammers from using automated software to collect addresses [it's called 'harvesting']. We don't want to spoil your fun, but it's a nasty world Out There. :-)
You can avoid any delay and/or frustration by using a PM in the first place.