WASHINGTON (CNN) — Old habits die hard, a long-time Hillary Clinton supporter proved this week when he sent out a press release from his new organization with press@hillaryclinton.com as the contact address.

Sam Arora, a Clinton aide for three years, made the goof Tuesday in a press release for VoteBoth, which is pressing for a ticket that would bring the two Democratic rivals together.

The release said "press@voteboth.com," but linked to the Clinton campaign's generic media e-mail address.

Arora said it was a simple mistake caused by his using an old Microsoft document to make the new one.

"I didn't realize that, when you do this in Microsoft Word, you have to look at what the html says," he said. "This was just me being technically unadvanced."

Collusion between VoteBoth and the Clinton campaign would be illegal, since VoteBoth filed with the Federal Election Commission as independent of any candidate or its committees.

Founded a month ago to promote a ticket with Clinton on top and Sen. Barack Obama as vice-president, VoteBoth was retooled last week to say either candidate could lead the ticket.

Its founder, Adam Parkhomenko, is a die-hard Clintonite who was 17 years old when he launched an online drive in 2003 to draft her to run for president in 2004. He went on to become the right-hand man of Patti Solis Doyle, the Clinton campaign director who was ousted in March after a string of Clinton defeats. Parkhomenko left the campaign soon after Doyle did.

The launch of VoteBoth — originally called Clinton/Obama '08 — prompted muttering in the blogosphere about ongoing links between Parkhomenko and the Clinton campaign.