-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Mark Brown wrote: >> network, including a domain that host is in". At least from my >> experience I can witness that there exist systems (mail and news) that >> resolve the domain part of a message id (i.e. at least the part >> following the first dot; if not TLD). > > Could you please provide some examples of this behaviour? >
I remember articles being rejected because of a malformed Message-Ids, which were built from fido-style addresses and Fido MSGIDs and did not follow the <[EMAIL PROTECTED]> scheme (although unique). Regarding news, name resolution is not an issue because fake addresses are very common, however "well-formedness" can be. Name resolution might be an issue for mail servers since the stress caused by spam is higher and filters are common. Resolving a sender's email-address is common practice. For example, I noticed that big company1 verifies that a machine sending e-mails with adresses of big company2 is really an MX of company2 and rejects them otherwise. The Message-Ids found in the majority of the e-mail traffic are unsuspicious because the simply contain the (resolvable) domain part of the e-mail address. Other message-ids are suspicious and may increment a spam score (e.g. google for 'outlook message id spam'). Spamassassin gathers a few features from the Message-Id line -- and I also know a server which uses the domain-part of a message-id for additional spam-scoring -- not too unfound, IMO. Fortunately, Message-Id generation is not an issue with leafnode and README-FQDN contains enough ideas for creating nice Ids. Regards, - -- Michael -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHinAU2AeXPDkfIYIRAufTAJ9ZQ2GSGG5tuFpF16kdvzl5WKV5cACfd+AE 5ce+AbBDiXaHQD/dtrW6/KI= =8dnB -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
