diff options
Diffstat (limited to 'fetchmail.man')
| -rw-r--r-- | fetchmail.man | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/fetchmail.man b/fetchmail.man index 86a01bd5..7a596e77 100644 --- a/fetchmail.man +++ b/fetchmail.man @@ -1670,17 +1670,20 @@ default, because doing RFC2047 conversion on headers throws away character-set information and can lead to bad results if the encoding of the headers differs from the body encoding. .PP -The `idle' option is usable only with IMAP servers supporting the -RFC2177 IDLE command extension. If it is enabled, and fetchmail -detects that IDLE is supported, an IDLE will be issued at the end -of each poll. This will tell the IMAP server to hold the connection -open and notify the client when new mail is available. If you need to -poll a link frequently, IDLE can save bandwidth by eliminating TCP/IP -connects and LOGIN/LOGOUT sequences. On the other hand, an IDLE -connection will eat almost all of your fetchmail's time, because it -will never drop the connection and allow other pools to occur unless -the server times out the IDLE. It also doesn't work with multiple -folders; only the first folder will ever be polled. +The `idle' option is intended to be used with IMAP servers supporting +the RFC2177 IDLE command extension, but does not strictly require it. +If it is enabled, and fetchmail detects that IDLE is supported, an +IDLE will be issued at the end of each poll. This will tell the IMAP +server to hold the connection open and notify the client when new mail +is available. If IDLE is not supported, fetchmail will simulate it by +periodically issuing NOOP. If you need to poll a link frequently, IDLE +can save bandwidth by eliminating TCP/IP connects and LOGIN/LOGOUT +sequences. On the other hand, an IDLE connection will eat almost all +of your fetchmail's time, because it will never drop the connection +and allow other pools to occur unless the server times out the IDLE. +It also doesn't work with multiple folders; only the first folder will +ever be polled. + .PP The `properties' option is an extension mechanism. It takes a string argument, which is ignored by fetchmail itself. The string argument may be |