diff options
| author | Philip Hazel <ph10@hermes.cam.ac.uk> | 2004-12-20 15:24:27 +0000 |
|---|---|---|
| committer | Philip Hazel <ph10@hermes.cam.ac.uk> | 2004-12-20 15:24:27 +0000 |
| commit | ff4dbb191fab3d0bc10b82bb6d59898d03c2b50d (patch) | |
| tree | cc0ce5db63a89d3844d024decac6f921525c9af3 /doc/doc-txt | |
| parent | b1206957506a8d30e54c3d76c3ada5f247118666 (diff) | |
Added Tony's defer_foo patch to dnsdb lookups.
Diffstat (limited to 'doc/doc-txt')
| -rw-r--r-- | doc/doc-txt/ChangeLog | 5 | ||||
| -rw-r--r-- | doc/doc-txt/NewStuff | 20 |
2 files changed, 19 insertions, 6 deletions
diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog index 6774dad4a..a12145aeb 100644 --- a/doc/doc-txt/ChangeLog +++ b/doc/doc-txt/ChangeLog @@ -1,4 +1,4 @@ -$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.46 2004/12/20 14:57:05 ph10 Exp $ +$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.47 2004/12/20 15:24:27 ph10 Exp $ Change log file for Exim from version 4.21 ------------------------------------------- @@ -157,7 +157,8 @@ Exim version 4.50 just the host names, not the priorities. (3) It is now possible to give a list of domains (or IP addresses) to be - looked up. + looked up. The behaviour when one of the lookups defers can be + controlled by a keyword. (4) It is now possible to specify the separator character for use when multiple records are returned. diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff index 16c9c4653..3109ea96f 100644 --- a/doc/doc-txt/NewStuff +++ b/doc/doc-txt/NewStuff @@ -1,4 +1,4 @@ -$Cambridge: exim/doc/doc-txt/NewStuff,v 1.20 2004/12/17 14:52:44 ph10 Exp $ +$Cambridge: exim/doc/doc-txt/NewStuff,v 1.21 2004/12/20 15:24:27 ph10 Exp $ New Features in Exim -------------------- @@ -152,9 +152,21 @@ Version 4.50 single item are handled. The dnsdb lookup fails only if all the DNS lookups fail. If there is a - temporary DNS error for any of them, the remaining lookups are still done, - and only if none of them succeed does the dnsdb lookup defer. As long as at - least one of the DNS lookups yields some data, the dnsdb lookup succeeds. + temporary DNS error for any of them, the behaviour is controlled by + an optional keyword followed by a comma that may appear before the record + type. The possible keywords are "defer_strict", "defer_never", and + "defer_lax". With "strict" behaviour, any temporary DNS error causes the + whole lookup to defer. With "never" behaviour, a temporary DNS error is + ignored, and the behaviour is as if the DNS lookup failed to find anything. + With "lax" behaviour, all the queries are attempted, but a temporary DNS + error causes the whole lookup to defer only if none of the other lookups + succeed. The default is "lax", so the following lookups are equivalent: + + ${lookup dnsdb{defer_lax,a=one.host.com:two.host.com}} + ${lookup dnsdb{a=one.host.com:two.host.com}} + + Thus, in the default case, as long as at least one of the DNS lookups + yields some data, the dnsdb lookup succeeds. 15. 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 |