I am using cyrus-imap 2.4.6 If I set serverinfo: off in imapd.conf then the banner of cyrus is hidden for imap and pop But I think timsieved does not hide the banner [root@centos ~]# grep serverinfo /etc/imapd.conf serverinfo: off [root@centos ~]# telnet localhost 2000 Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. "IMPLEMENTATION" "Cyrus timsieved v2.4.6-Invoca-RPM-2.4.6-3" "SASL" "PLAIN" "SIEVE" "comparator-i;ascii-numeric fileinto reject vacation imapflags notify envelope relational regex subaddress copy" "STARTTLS" OK ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/