4.e3? doesn't look very strong. When I encounter this variation, I playe the 4.Nf3 line.
Albin Counter Gambit: Lasker's Trap
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May 9, 2017
0
#3
@Ripper89 after 8.Nf3 stockfish gives +0.3, looks like the position is equal. So I guess this means not playing 5. Bd2 dxe3, white has not fallen for the trap.
May 9, 2017
0
#4
4. e3?! and 5. Bd2?! are inaccuracies. However, the final position after 8. Qf3 or 8. Nf3 is evaluated at approx. -0.4. So, the game can be continued. 
May 9, 2017
0
#5
m0rki wrote:
@Ripper89 after 8.Nf3 stockfish gives +0.3, looks like the position is equal. So I guess this means not playing 5. Bd2 dxe3, white has not fallen for the trap.
At d=20 Stockfish 8 here gives -0.4.
E3 is not a good move, id recommend a3 instead. Easy to learn and intuitive to play.
http://www.youtube.com/watch?v=cKXMzdu7ix0&feature=rec-HM-fresh+div