POP vs. IMAP
Main DifferencePOP and IMAP are the email protocols. The email protocol is the procedure used by the email program to communicate with the server. IMAP stands for "Internet Messaged Access Protocol, which keep sync with mail server. It will appear on webmail inbox if any change is made in your mail client. POP stands for "Post Office Protocol", which don't sync with mail server and thus any change on email account will not appear on webmail inbox.

Difference Between POP and IMAP
POP vs. IMAP
IMAP constantly sync the email program with mail server but POP don't sync.
POP vs. IMAP
In IMAP you can access your email message anytime from anywhere through any device while in POP once the email message is downloaded, it can now only be accessed through that device only.
POP vs. IMAP
IMAP let you to access previous read messages when offline but you can't get unread messages offline while POP does allow you to access the received messages when offline.
POP vs. IMAP
IMAP let you to read email from multiple locations while POP don't allow you to read message from some other location.
POP vs. IMAP
Email check with IMAP is faster than with PO.
POP vs. IMAP
In POP filters transfer in/out emails to local mailboxes only while in IMAP filters transfers emails to other mailboxes where so ever they may locate.
POP vs. IMAP
Messages are deleted on PC in POP while in IMAP messages are deleted directly on the server.
Popnoun
(countable) A loud, sharp sound as of a cork coming out of a bottle.
Listen to the pop of a champagne cork.Popnoun
An effervescent or fizzy drink, most frequently nonalcoholic; soda pop.
Lunch was sandwiches and a bottle of pop.Popnoun
A bottle, can, or serving of effervescent or fizzy drink, most frequently nonalcoholic; soda pop.
Go in the store and buy us three pops.Popnoun
A pop shot: a quick, possibly unaimed, shot with a firearm.
The man with the gun took a pop at the rabbit.Popnoun
A quantity dispensed, a portion, apiece.
They cost 50 pence a pop.Popnoun
Something that stands out or is distinctive, especially to the senses.
a white dress with a pop of reda pop of vanilla flavourPopnoun
(computing) The removal of a data item from the top of a stack.
Popnoun
A bird, the European redwing.
Popnoun
(physics) The sixth derivative of the position vector with respect to time (after velocity, acceleration, jerk, jounce, crackle), i.e. the rate of change of crackle.
Popnoun
A pistol.
Popnoun
(colloquial) Affectionate form of father.
My pop used to tell me to do my homework every night.Popnoun
Pop music.
Popnoun
A Russian Orthodox priest; a parson.
Popverb
(intransitive) To make a pop, or sharp, quick sound.
The muskets popped away on all sides.Popverb
(ergative) To burst (something) with a popping sound.
The boy with the pin popped the balloon.This corn pops well.Popverb
To enter, or issue forth, with a quick, sudden movement; to move from place to place suddenly; to dart.
A rabbit popped out of the hole.Popverb
To place (something) (somewhere); to move or position (something) with a short movement.
Just pop it in the fridge for now.He popped his head around the door.Popverb
To make a short trip or visit.
I'm just popping round to the newsagent.I'll pop by your place later today.Popverb
(intransitive) To stand out; to be distinctive to the senses.
This colour really pops.Popverb
(transitive) To hit (something or someone).
He popped me on the nose.Popverb
To shoot (usually somebody) with a firearm.
Popverb
To ejaculate.
Popverb
To remove (a data item) from the top of a stack.
Popverb
To remove a data item from the top of (a stack).
Popverb
To pawn (something) (to raise money).
I had to pop my watch to see me through until pay-day.Popverb
To swallow (a tablet of a drug).
Popverb
To perform (a move or stunt) while riding a board or vehicle.
Popverb
To undergo equalization of pressure when the Eustachian tubes open.
My ears popped as the aeroplane began to ascend.Popinterjection
Used to represent a loud, sharp sound, as of a cork coming out of a bottle.
Popadjective
(used attributively in set phrases) Popular.
Popnoun
an informal term for a father; probably derived from baby talk
Popnoun
a sweet drink containing carbonated water and flavoring;
in New England they call sodas tonicsPopnoun
a sharp explosive sound as from a gunshot or drawing a cork
Popnoun
music of general appeal to teenagers; a bland watered-down version of rock'n'roll with more rhythm and harmony and an emphasis on romantic love
Popverb
bulge outward;
His eyes poppedPopverb
hit a pop-fly;
He popped out to shortstopPopverb
make a sharp explosive noise;
The cork of the champagne bottle poppedPopverb
fire a weapon with a loud explosive noise;
The soldiers were poppingPopverb
cause to make a sharp explosive sound;
He popped the champagne bottlePopverb
appear suddenly or unexpectedly;
The farm popped into view as we turned the cornerHe suddenly popped up out of nowherePopverb
put or thrust suddenly and forcefully;
pop the pizza into the microwave ovenHe popped the petit-four into his mouthPopverb
release suddenly;
pop the clutchPopverb
hit or strike;
He popped me on the headPopverb
drink down entirely;
He downed three martinis before dinnerShe killed a bottle of brandy that nightThey popped a few beer after workPopverb
take drugs, especially orally;
The man charged with murder popped a valium to calm his nervesPopverb
cause to burst with a lound, explosive sound;
The child popped the balloonPopverb
burst open with a sharp, explosive sound;
The balloon poppedThis popcorn pops quickly in the microwave ovenPopadjective
(of music or art) new and of general appeal (especially among young people)
Popadverb
like a pop or with a pop;
everything went popWhat is IMAP?
IMAP stands for “Internet Message Access Protocol, which keep sync with mail server. It will appear on webmail inbox if any change is made in your mail client. IMAP enables you to access the mail from multiple mail clients in real time. Messages are stored in a remote server. You can access your mail from anywhere from any computer or even through mobile devices.
What is POP?
POP stands for “Post Office Protocol”, which don’t sync with mail server and thus any change on email account will not appear on webmail inbox. Using POP, when you open a email message from a computer, it will be deleted from the server. Now you can only read that message from that specific device but unable to read from other devices or PC.