Copyright Office spokeswoman Julie Kallman said the blocking of emails is part of a wider effort to “keep out potential copyright infringement.”
She added, “We are not going to respond to these types of requests.”
Kallmann said the office is currently investigating why the email accounts of some of its employees were being blocked.
She added that the blocking is not related to any copyright infringement or threats.
“We have not received any complaints about this,” she said.
“It is not a threat or a legal action.
We just want to make sure that we are doing the right thing.”
Kallo’s comments come after an online petition urging the Office to block users who used the hashtag #StopBoatGate gained nearly 500,000 signatures.
Kallo also said that while the government does not have any legal authority to block email accounts, it would work to enforce existing laws if it was “imperative to protect the integrity of the copyright system.”
Copyright Office officials did not respond to Fox News’ request for comment.
The US government has long been criticized for its use of copyright to stifle political dissent.
It is not clear how many people have signed the petition, but some online commentators have argued that blocking email accounts could be a form of political censorship.