With a number of impressive saves already under his belt throughout the opening month of the season, Bailey Peacock-Farrell was on hand with another.
After finding some space down the left, Owura Edwards whipped a ball to the back post for Harry Leonard - who saw his close-range header stopped by some quick reactions from the Seasiders goalkeeper.
Down the other end, it was Ian Evatt’s side who opened the scoring in the 18th minute, with the deadlock being broken by Jorfan Williams after some defensive confusion in the box.
Blackpool were swift in doubling their lead, and left no time for the Posh to compose themselves.
A shot from Josh Bowler was parried by Alex Bass, with Dion Charles being the first to react from close-range to finish for his first goal in Tangerine.
After some poor defending from the visitors, there were some woes in attack. Edwards was on hand with another impressive ball into the box, but Ethan Williams could only his first-time effort over the crossbar.
There were opportunities for the Seasiders to extend their lead further ahead of the break. Bass was able to make up for earlier errors, stopping a curling effort from Charles, before denying Bowler - who fired towards the front post.
The start of the second half followed a similar pattern to the first. Peacock-Farrell was on hand with another strong save, this time denying Williams, before Blackpool pounced at the other end.
A George Honeyman cross from the right was met by Karoy Anderson - who flicked home a header across the face of goal.
Jerry Yates’ introduction came just after the hour mark, and it took him only nine minutes get register the first goal of his second spell, following his loan move from Luton Town last week.
With the ball loose in the box, the forward pounced from close-range to make it 4-0.
Here’s how the Seasiders performed:
7. Karoy Anderson - 8
Karoy Anderson found himself in the perfect place in the box to direct a header to the back post for his goal. Photo: Gareth Evans
8. Albie Morgan - 7
Albie Morgan put in a good shift in the centre of the park. Photo: Gareth Evans
9. George Honeyman - 7
George Honeyman worked hard in the centre of the park and was on hand with a perfect cross for Anderson's goal. Photo: Gareth Evans
10. CJ Hamilton - 7
CJ Hamilton worked hard down the left side, and used his pace to help the defensive effort. Photo: Gareth Evans
11. Tom Bloxham - 8
Tom Bloxham put a shift in at the top end of pitch, and will be hard to displace up front. Photo: Gareth Evans
12. Dion Charles - 8
Dion Charles looked lively in his best offering yet in Tangerine, with the forward being alert to finish from close-range for the Seasiders' second. Photo: Gareth Evans