搭建邮局出现这个情况怎么处理

warn: Either spamassassin or spamc are not available. Spam score computation is disabled.
Port 2333 is already in use
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! forsaken-mail@1.0.0 start: `node ./bin/www`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the forsaken-mail@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2018-05-11T06_17_25_977Z-debug.log