pop3.mod will failed after the test account surpass 2400

[ihacku]

command line arguments:
medusa -h ip -O pw.txt -M pop3 -L -c 100 -p '123qwe!@#' -U mail.txt

ACCOUNT CHECK: [pop3] Host: ip (1 of 1, 0 complete) User: username (2400 of 7xxx, 2399 complete) Password: 123qwe!@# (1 of 1 complete)
ERROR: [pop3.mod] Failed: Unexpected or no data received: (null)

[jmk-foofus]

Does Medusa always terminate around 2400 checks? If you increase the debug level (-w 99 -v 99), is there anything revealing prior to it ending? If not, reviewing a packet capture would likely be necessary. It's possible the remote server is indeed to ending the connection.