The spammer-in-chief was back last night.

President Obama, whose official campaign Twitter account blasted out 100 messages in a single afternoon in late July, did it again Thursday night.

Only this time it was the official White House press office e-mail account that lit-up inboxes.

After the president’s jobs speech before Congress Thursday night, his staff sent out 39 e-mails to reporters, each declaring that yet another Obama ally “backs the American Jobs Act,” as the subject lines boasted.

The e-mails came within a 1-hour, 5-minute period between 8:32 p.m. and 9:37 p.m. That’s an average of one every minute and 40 seconds.

In all, Obama spoke 4,132 words in his 32-minute address. The number of words spoken by the various supporters quoted in the e-mails: 7,165.

The messages included supportive comments from 10 senators, four House representatives, four governors and four mayors. Chief executives of Fortune 500 companies weighed in, as did union leaders.

House Minority Leader Nancy Pelosi (D-Calif.) was apparently so enthusiastic about Obama’s jobs plan that the White House sent out her supportive comment twice — in one e-mail, she was identified as Democratic Leader Nancy Pelosi, though in the other she was downgraded to mere Representative Pelosi.

Teamsters President Jimmy Hoffa, who got into some hot water with the tea party for divisive comments he made at a Detroit labor rally on Monday, was suddenly preaching unity in the e-mail from the White House.

“Congress must pass President Obama’s plan now,” Hoffa was quoted as saying. “The jobs crisis is an American problem. It isn’t President Obama’s problem and it isn’t a Republican or Democratic problem. All Americans need to come together to create good jobs for the good of our economy and the good of our country.”

The White House probably believed that the e-mail barrage showed overwhelming support for the president’s $447 billion jobs proposal. But it mostly came off looking desperate to a cynical press corps, most of whom did not quote from the e-mails but rather used comments garnered after the event from more skeptical Republicans.

“Dear White House, take a page from the RNC. Send me all the people commenting on obama’s plan in 1 email, rather than one at a time,” wrote Jon Ward of the Huffington Post on his Twitter account.

“Hey White House Press Office? I know that every Democrat supports your jobs bill or whatever. Stop sending me an email for each one,” wrote Michael Warren of The Weekly Standard.

Michael van Poppel, creator of BNO News, posted a screenshot of the email flood on his Twitter account.

In July, after Obama said in a televised address that people should “tweet” their congressional representatives in support of his plans to cut the deficit, his campaign Twitter account sent out 100 messages with the Twitter account names of House Republicans.

The strategy got mixed results. Many of the campaign’s more than 9 million Twitter followers responded, but by the end of the day @barackobama suffered a net loss of more than 30,000 followers. One labeled Obama the “spammer of the month.”