The following technical requirements apply to the delivery of Internet email through AOL's email network.
- AOL's servers will not accept connections from unsecured systems. These
include open relays, open
proxies, open routers, or any other system that has been determined to be
available for unauthorised use.
- AOL's mail servers will not accept connections from systems that use
dynamically assigned or residential IP addresses.
- AOL will not deliver email that contains a hex-encoded Universal Resource
Locator (URL) (e.g. http://%6d%6e%3f/).
- AOL's mail servers will reject connections from any IP address that
does not have reverse DNS (a
- AOL may reject connections from servers whose recipient lists consistently
generate a higher than 10% bounce failure rate (i.e. over 10% of a sender's mailing
list is destined for users that do not exist on our system).
- AOL may reject connections from senders who are unable to accept at
least 90% of the bounce-return messages (mailer-daemon failure/error messages)
destined for their systems.
- Complaints submitted by AOL members will be used as a basis for refusing
connections from any mail server.
- AOL may provide daily communications to email@example.com and firstname.lastname@example.org (or @IP.address if no reverse-DNS or PTR records are present) to senders who may be in violation of AOL's guidelines.
For additional information on some of the terms discussed here, please visit the Information Centre.