From UKIPBWC

Email addresses should reflect the branch, or campaign, so that if you know the email address, you know the web address. Committee positions rather than names are also a good idea, so that if a position changes, no major updates are required.

Generic address prefixes are acceptable but be forewarned that spammers will quickly find them.

Examples

By name	By position	Generic
name@ukipbranch.org.uk	chairman@ukipbranch.org.uk	contact@ukipbranch.org.uk

Email Forms

Why not use a form (such as FoxyForm) that requires anti-spam data entry before passing on the message? An example can be found here (with background colour set to ffffcc): Contact UKIP (Yardley)