Expand description
seq-range = seq-number ":" seq-number
Two seq-number values and all values between these two regardless of order.
Example: 2:4 and 4:2 are equivalent and indicate values 2, 3, and 4.
Example: a unique identifier sequence range of 3291:* includes the UID of the last message in the mailbox, even if that value is less than 3291.