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Diffstat (limited to 'doc/doc-txt/NewStuff')
| -rw-r--r-- | doc/doc-txt/NewStuff | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff index ee9f55c31..810607a5b 100644 --- a/doc/doc-txt/NewStuff +++ b/doc/doc-txt/NewStuff @@ -1,4 +1,4 @@ -$Cambridge: exim/doc/doc-txt/NewStuff,v 1.12 2004/11/19 09:45:54 ph10 Exp $ +$Cambridge: exim/doc/doc-txt/NewStuff,v 1.13 2004/11/19 15:18:57 ph10 Exp $ New Features in Exim -------------------- @@ -129,6 +129,43 @@ Version 4.44 the name servers for the high-level domains such as .com or .co.uk are not going to be on such a list. +13. It is now possible to specify a list of domains or IP addresses to be + looked up in a dnsdb lookup. The list is specified in the normal Exim way, + with colon as the default separator, but with the ability to change this. + For example: + + ${lookup dnsdb{one.domain.com:two.domain.com}} + ${lookup dnsdb{a=one.host.com:two.host.com}} + ${lookup dnsdb{ptr = <; 1.2.3.4 ; 4.5.6.8}} + + In order to retain backwards compatibility, there is one special case: if + the lookup type is PTR and no change of separator is specified, Exim looks + to see if the rest of the string is precisely one IPv6 address. In this + case, it does not treat it as a list. + + The data from each lookup is concatenated, with newline separators (by + default - see 14 below), in the same way that multiple DNS records for a + single item are handled. + + The lookup fails only if all the DNS lookups fail. As long as at least one + of them yields some data, the lookup succeeds. However, if there is a + temporary DNS error for any of them, the lookup defers. + +14. It is now possible to specify the character to be used as a separator when + a dnsdb lookup returns data from more than one DNS record. The default is a + newline. To specify a different character, put '>' followed by the new + character at the start of the query. For example: + + ${lookup dnsdb{>: a=h1.test.ex:h2.test.ex}} + ${lookup dnsdb{>| mx=<;m1.test.ex;m2.test.ex}} + + It is permitted to specify a space as the separator character. Note that + more than one DNS record can be found for a single lookup item; this + feature is relevant even when you do not specify a list. + + The same effect could be achieved by wrapping the lookup in ${tr...}; this + feature is just a syntactic simplification. + Version 4.43 ------------ |