Not that I know of since D4 is -9 on block... I try not to do it at close range as much (unless I get a feeling the person is going to try to take their turn back with a string starter and not a poke, in which case I cancel into spin or auger). People can easily reply to a blocked d4 with any poke of their own and take their turn back if they've seen you consistently cancel into ~Auger or ~Spin or ~DB2B. At its max range, it's pretty safe against most of the cast except for those who have a long range D4 as well (Shao Kahn, Scarlett for ex)
B121 does jail as long as the B1 or 2 connects with the blocking opponent. If B12 doesnt hit, they can neutral duck the last hit.