Protocol\Smtp->data(): improve a bit
Protocol\Smtp->data(): improve a bit

replacing \n with \r\n and then calling explode \r\n is useless
also don't use strpos just to check the first char

Signed-off-by: Etienne CHAMPETIER <d24370f93c848f9b9e9043ebb082d433901eaa60@fiducial.net>

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