Hi,
This is to do with Snomasks.
/helpop ?snomasks
***** Snomasks *****
[10:26:53] -
[10:26:53] Snomask stands for 'Service NOtice MASK', it (mainly) controls which
[10:26:53] server notices you will receive.
[10:26:53] Usage: /MODE nick +s <snomask>
[10:26:53] Ex: /MODE blah +s +cF-j
[10:26:53] The parameter specifies which snomasks you want (or don't want).
[10:26:53] -
[10:26:53] Below is a list of possible snomasks:
[10:26:53] ==-------------------------oOo-----------------------==
[10:26:53] c = View connects/disconnects on local server
[10:26:53] e = View 'Eyes' server messages (OperOverride, /CHG* and /SET* usage, ..)
[10:26:53] f = View flood alerts
[10:26:53] F = View connects/disconnects on remote servers (except U-lines)
[10:26:53] G = View TKL notices (Gline, GZline, Shun, etc)
[10:26:53] j = View Junk notices (not recommended for normal use)
[10:26:53] k = View KILL notices
[10:26:53] n = View nick changes on local server
[10:26:53] N = View nick changes on remote servers
[10:26:53] o = View oper-up notices
[10:26:53] q = View rejected nick changes due to Q:lines
[10:26:53] s = View general notices
[10:26:53] S = View spamfilter matches
[10:26:53] v = View usage of /VHOST command
[10:26:53] ==-------------------------oOo------------------------==