> It might be the case that it's useful for an MTA to have an option to > skip MX lookup for specific destinations because of DNS brokenness at > those destinations. But this seems to me to be outside of the scope of > the standard. By the same token, discussions of gatewaying to non-Internet systems could be considered "outside the standard". But RFC 2821 devotes many pages to discussing this sort of thing. > Skipping MX lookup is not acceptable as a general > practice, nor is it something we want to encourage. I never implied that it was acceptable. In fact I'm fairly sure I said the exact opposite. > In general, it's always been acceptable to configure an MTA to handle > mail in some special-case way for specific domains where there was > specific knowledge such that the special-case handling made sense for > those domains. The MX-then-A lookup is what you should do in the > absence of any such knowledge. Yep. Ned _______________________________________________ IETF mailing list IETF@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf