USPS First class mail

[dukesilver24]

Why am I all of sudden unable to find USPS First class when I was finding it yesterday?

[stainlessenginecovers]

1st Class doesn't exist anymore per the USPS as of 7/9. It 'merged' with Ground Advantage. Use that. 

[714ricki]

Just in case you haven't followed all the news about USPS 1st Class Mail, that service level transitioned over to USPS Ground Advantage on Sunday. You will need to select USPS Ground Advantage for anything that would have gone out USPS 1st Class Mail & adjust all of your listings accordingly.

Good luck!