Is guild mail instant in classic wow

In Classic World of Warcraft, guild mail is not instant. When a guild member sends a guild mail, it takes a short period of time to arrive at the recipient's mailbox.

The exact delay is not explicitly stated in the game, but based on player reports and testing, it appears to be around 10-15 minutes. This means that if a guild member sends a guild mail at 3:00 PM, the recipient will likely receive it around 3:10-3:15 PM.

It's worth noting that this delay is not unique to guild mail and applies to all types of mail in Classic WoW, including regular mail and trade chat mail.