"significant email traffic" over password resets.
The "consequence" of all that traffic are that some ISPs are "throttling the emails," warns Sony. Be patient and "refrain from submitting multiple requests."
Sony has released all-new firmware to accompany PlayStation Network returning to service which includes new security measures but users are also required to change their passwords. This is causing a ruckus for ISP servers though as all those emails get sent.
"With the huge number of people coming back online at the same time and resetting their passwords, it is creating significant email traffic to ISPs," in a statement. "The consequence is that some of the ISPs are throttling the emails."
"We are currently trying to resolve this, but in the meantime please be patient and refrain from submitting multiple requests. You will receive your reset email and be able to get back to enjoying your online gaming."
PSN was turned off last night for half an hour to try and clear the huge queue of resets. Multiplayer gaming is the first priority for Sony as they kick start the PlayStation Network again, followed by other features like movie streaming, Home, friends lists, etc.
The PlayStation Store is still being worked on and remains unavailable.