He should try auto-correct.

Billionaire supermarket mogul and Republican mayoral candidate John Catsimatidis sent out an e-mail blast to select supporters that was riddled with misspelled words and bizarre capitalizations, The Post has learned.

Catsimatidis pressed “send” on the barely literate message in response to a new campaign commercial by chief rival GOP Joe Lhota, in which former Mayor Rudy Giuliani blasted Catsimatidis’ recent attack ads against the ex-MTA chief.

“They went Negative First using NY Post as there SURRAGATE attack DOG. That’s why our guys pushed into this Ads,” Catsimatidis wrote.

The typo-prone owner of the Gristedes supermarket chain has amassed a fortune estimated at $3 billion by Forbes.

Campaign spokesman Rob Ryan insisted that Catsimatidis — who’s legally blind in one eye — “can spell,” and blamed the candidate’s use of his handheld device.