anitha is incorrect, he's confusing the way oracle or other databases handle triggers, vs the way SQL Server works.
SQL Server's trigger is called once for any statement, whether it is one row or a million rows.
in your case, since you need to call a stored proc to send your email, you'd want to do call the procedure one time for each row inserted.
this trigger I'm pasting below would correctly execute for each item that met the criteria; note the one thing missing is the Primary key of the inserted and deleted tables..i assumed "ID" was the column name, but you'd need to change that.
--USE [TRAIN]
GO
/****** Object: Trigger [dbo].[tr_CHECK_SRVSTAT] Script Date: 07/21/2009 09:47:25 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER TRIGGER [dbo].[tr_CHECK_SRVSTAT]
ON [TRAIN].[dbo].[SVC00200]
AFTER UPDATE
AS
BEGIN --Trigger body
DECLARE @CALLNBR VARCHAR(64)
DECLARE C1 CURSOR FOR
SELECT
INSERTED.CALLNBR
FROM INSERTED
INNER JOIN DELETED
ON INSERTED.ID = DELETED.ID
WHERE INSERTED.SRVSTAT DELETED.SRVSTAT --had to change from previous value
AND INSERTED.SRVSTAT= 800 --changed to 800
OPEN C1
FETCH NEXT FROM C1 INTO @CALLNBR
WHILE @@fetch_status -1
BEGIN
EXEC sp_webServiceRequest_EmailComplete @CALLNBR
FETCH NEXT FROM C1 INTO @CALLNBR
END
CLOSE C1
DEALLOCATE C1
END--Trigger body
Lowell