If the person you are seeking is not listed in our database, another strategy is useful in cases where you know (or can guess at) the name of a person's organization. Reset the search form, and fill in only the "Organization" field. The search results will normally give you a list of e-mail addresses at that organization, and (at the very top) a link labeled "Resources for checking organization addresses".
The list of e-mail addresses will sometimes suggest a standard addressing format in use at that organization. For example, you might notice that nearly all addresses have the person's first initial and surname before the '@', and "server1.company-name.com" after the '@'. Using this format as a guideline, you can construct a potential e-mail address for the person you are seeking, and send them a brief message asking whether they are the correct individual.
The link labeled "Resources for checking organization addresses" will often lead to a directory service operated locally by the specified organization. These local directory services are completely separate from the usenet-addresses.mit.edu site, and will generally have a somewhat different design and user interface. However, since the data available to these services is usually maintained locally within the specified organization, it is often very up-to-date. The maintainers of usenet-addresses.mit.edu are not responsible for the behavior of these directory services. There is no guarantee that accessing these services will be useful or appropriate for finding the e-mail address that you are seeking.
Please report problems to email@example.com