# Config files on harddisk, in <installdir>/isp/*.xml. Same file format as below. This is only for intranet deployments, we won't be shipping any configs by default anymore, in favor of the following alternatives.
# Try to contact a mail configuration server of the provider
#* (Not yet implemented) Define a DNS TXT record on domain example.net (for my.account@example.net) which contains an URL like e.g. https://mailconfigwww.example.net/mozilla.xml . A similar, but slightly different proposal is described in detail on [[Thunderbird:Autoconfiguration:DNSBasedLookup|DNSBasedLookup]].
#* Alternatively (currently implemented), just try to contact https://autoconfig.<i>emailaddressdomain</i>/mail/mozilla.xml?emailaddress=<i>emailaddress</i> and see whether that host/URL exists.
#* That file contains the mail configuration. Content is described on [[Thunderbird:Autoconfiguration:ConfigFileFormat|ConfigFileFormat]].