function IsValidEmail(email)
dim names, name, i, c

\'Check for valid syntax in an email address.
IsValidEmail = true
names = Split(email, \"@\")
if UBound(names) <> 1 then
IsValidEmail = false
exit function
end if
for each name in names
if Len(name) <= 0 then
IsValidEmail = false
exit function
end if
for i = 1 to Len(name)
c = Lcase(Mid(name, i, 1))
if InStr(\"abcdefghijklmnopqrstuvwxyz_-.\", c) <= 0 and not IsNumeric(c) then
IsValidEmail = false
exit function
end if
next
if Left(name, 1) = \".\" or Right(name, 1) = \".\" then
IsValidEmail = false
exit function
end if
next
if InStr(names(1), \".\") <= 0 then
IsValidEmail = false
exit function
end if
i = Len(names(1)) - InStrRev(names(1), \".\")
if i <> 2 and i <> 3 then
IsValidEmail = false
exit function
end if
if InStr(email, \"..\") > 0 then
IsValidEmail = false
end if
end function