diff options
Diffstat (limited to 'fetchmail.man')
| -rw-r--r-- | fetchmail.man | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/fetchmail.man b/fetchmail.man index 48a17776..3979bdaf 100644 --- a/fetchmail.man +++ b/fetchmail.man @@ -596,8 +596,8 @@ See USER AUTHENTICATION below for a complete description. .B \-I <specification> | \-\-interface <specification> (Keyword: interface) Require that a specific interface device be up and have a specific local -or remote IP address (or range) before polling. Frequently -.I fetchmail +or remote IPv4 (IPv6 is not supported by this option yet) address (or +range) before polling. Frequently \fIfetchmail\fP is used over a transient point-to-point TCP/IP link established directly to a mailserver via SLIP or PPP. That is a relatively secure channel. But when other TCP/IP routes to the mailserver exist (e.g. when the link @@ -609,7 +609,7 @@ the specified link is not up or is not connected to a matching IP address, polling will be skipped. The format is: .sp .nf - interface/iii.iii.iii.iii/mmm.mmm.mmm.mmm + interface/iii.iii.iii.iii[/mmm.mmm.mmm.mmm] .fi .sp The field before the first slash is the interface name (i.e. sl0, ppp0 @@ -620,6 +620,8 @@ assumed (i.e. an exact match). This option is currently only supported under Linux and FreeBSD. Please see the .B monitor section for below for FreeBSD specific information. +.sp +Note that this option may be removed from a future fetchmail version. .TP .B \-M <interface> | \-\-monitor <interface> (Keyword: monitor) @@ -640,6 +642,8 @@ must be installed SGID kmem. This would be a security hole, but fetchmail runs with the effective GID set to that of the kmem group .I only when interface data is being collected. +.sp +Note that this option may be removed from a future fetchmail version. .TP .B \-\-auth <type> (Keyword: auth[enticate]) @@ -2101,7 +2105,8 @@ This is a convenient but also slow method. To speed it up, pre-declare mailserver aliases with 'aka'; these are checked before DNS lookups are done. If you're certain your aka list contains .B all -DNS aliases of the mailserver (and all MX names pointing at it) +DNS aliases of the mailserver (and all MX names pointing at it - note +this may change in a future version) you can declare 'no dns' to suppress DNS lookups entirely and \fIonly\fR match against the aka list. @@ -2241,9 +2246,11 @@ in foreground while a background fetchmail is running will do whichever of these is appropriate to wake it up. .SH BUGS AND KNOWN PROBLEMS +.PP The assumptions that the DNS and in particular the checkalias options make are not often sustainable. For instance, it has become uncommon for -an MX server to be a POP3 or IMAP server at the same time. +an MX server to be a POP3 or IMAP server at the same time. Therefore the +MX lookups may go away in a future release. .PP The mda and plugin options interact badly. In order to collect error status from the MDA, fetchmail has to change its normal signal @@ -2252,6 +2259,10 @@ of the poll cycle. This can cause resource starvation if too many zombies accumulate. So either don't deliver to a MDA using plugins or risk being overrun by an army of undead. .PP +The --interface option does not support IPv6 and it is doubtful if it +ever will, since there is no portable way to query interface IPv6 +addresses. +.PP The RFC822 address parser used in multidrop mode chokes on some @-addresses that are technically legal but bizarre. Strange uses of quoting and embedded comments are likely to confuse it. |