La forma más fácil de pasar de una pequeña tabla de una sola columna a una sola cadena delimitada [cerrado]

Was planning to put the following in a stored procedure but I now feel it lends itself better to being a udf.

It takes a small table like the following:

And returns a string like this:

a@b.c; b@c.d; c@d.e

How do I get rid of the temp table from the following so I can convert it to a function?

CREATE FUNCTION dbo.udf_emailString
(
    @x  NVARCHAR(50) = NULL
)
RETURNS VARCHAR(2000)
BEGIN
SET NOCOUNT ON;


--1.get all the related email addresses connected with @x and @y
WITH allAddresses(Email)
    AS
    (
    SELECT  Email
    FROM    WH.xxx.vw_Permissions
    WHERE   IndReceiveMail = 1 AND
            X = COALESCE(@x,X)
    GROUP BY Email
    )
, allAddressesRn(Email, rn)
    AS
    (
    SELECT  Email,
            ROW_NUMBER() OVER(ORDER BY Email)
    FROM    allAddresses
    ) 
SELECT  *
INTO    #EmailList
FROM    allAddressesRn;

--2.connect all of the above together seperating with semi-colons
DECLARE @fullAddress VARCHAR(2000) ='';
DECLARE @loopControl INT  = 1; 
WHILE @loopControl <= (SELECT MAX(rn) FROM #EmailList)
    BEGIN

        SET @fullAddress = 
            @fullAddress +  
                (
                SELECT  Email + '; '
                FROM    #EmailList
                WHERE   rn = @x
                );

    SET @loopControl = @loopControl + 1;
    END;

RETURN @fullAddress;

END;

EDITAR

With the comments and answer this seems to be a much more compact approach:

CREATE FUNCTION dbo.udf_emailString
(
    @x  NVARCHAR(50) = NULL
)
RETURNS VARCHAR(2000)
BEGIN


DECLARE @fullAddress VARCHAR(2000) ='';

SELECT @fullAddress = 
STUFF(
        (
    select '; ' + Email as [text()]
    FROM    
            (
            SELECT  Email
            FROM    WH.xxx.vw_Permissions
            WHERE   IndReceiveMail = 1 AND
                    X = COALESCE(@x,X)
            GROUP BY Email
            ) x
        for xml path ('')
)
,1,1,'');

SET @fullAddress = @fullAddress + ';';
RETURN @fullAddress;

END;