Agents’ Mutual and potentially thousands of agents were the subject of phishing attempts yesterday. The problem has now been fixed.

The business had to suspend all access to agents’ MyAM system in the afternoon.

It followed up with emails explaining there had been a phishing attack – an attempt to extract usernames and passwords.

The attack has not affected the OnTheMarket website.

CEO Ian Springett said in the email to agents: “You may by now be aware that we have suspended all access to the MyAM system this afternoon.

“The reason is that we and you have been the subject of a “phishing’ attack. The attack works as follows:

“The attacker creates fake My Agents” Mutual login page.

“They send member agents a fake email lead pretending that it has come us.

“The fake email has a link to the fake My Agents” Mutual login page.

“The member agents enter their login details, thereby giving the attacker access to their My Agents’ Mutual account.”

The email warns member agents to ensure they see the correct address in their browser’s address bar, to avoid being the victim of a phishing scheme.

The email also attached a screen shot of the fake log-in page, which looks very much the real website.

Springett warned: “Please be vigilant.”

A spokesman for OnTheMarket.com said: “The attempt did not affect the OnTheMarket.com website, nor any of our internal systems.

“We take our members’ security extremely seriously and are working hard to conclude our investigations.”