diff options
| author | Simon Arlott <bugzilla.exim.simon@arlott.org> | 2019-09-22 18:45:18 +0100 |
|---|---|---|
| committer | Jeremy Harris <jgh146exb@wizmail.org> | 2019-09-22 18:45:18 +0100 |
| commit | 6219e0ec4a59a06b84eaabb6b3ae5d9e8f166672 (patch) | |
| tree | 0e3588d3a332c240ea0fe14a480228f9c793903b /doc | |
| parent | 1a2e76e1676bf405a464a233950a95012533c227 (diff) | |
DNS: do not skip initial two components of SRV & TLSA lookups before checking name syntax.
The introduction of DKIM added _ to the permitted chars, so those components will pass.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/doc-docbook/spec.xfpt | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt index c2adc9ea6..5acdce0a6 100644 --- a/doc/doc-docbook/spec.xfpt +++ b/doc/doc-docbook/spec.xfpt @@ -14691,13 +14691,20 @@ recommended, except when you have no other choice. .cindex "UTF-8" "in domain name" Lots of discussion is going on about internationalized domain names. One camp is strongly in favour of just using UTF-8 characters, and it seems -that at least two other MTAs permit this. This option allows Exim users to -experiment if they wish. +that at least two other MTAs permit this. +This option allows Exim users to experiment if they wish. If it is set true, Exim's domain parsing function allows valid UTF-8 multicharacters to appear in domain name components, in addition to -letters, digits, and hyphens. However, just setting this option is not -enough; if you want to look up these domain names in the DNS, you must also +letters, digits, and hyphens. + +.new +If Exim is built with internationalization support +and the SMTPUTF8 ESMTP option is in use (see chapter &<<CHAPi18n>>&) +this option can be left as default. +.wen +Without that, +if you want to look up such domain names in the DNS, you must also adjust the value of &%dns_check_names_pattern%& to match the extended form. A suitable setting is: .code |