At 04:14 AM 11/30/2003, Matthew Seaman wrote:

Try changing your user account to 'marty' -- all lower case.  Use
vipw(8) to do that.  In general under Unix, usernames are almost
always all lower case and so are most host and domainnames.

Ohhh, didn't know that. Thanks Matthew, this worked.


The problem is that sendmail(8) [ or any standards compliant MTA ]
expects e-mail addresses to be case insensitive.

I knew that emails to


[EMAIL PROTECTED]
[EMAIL PROTECTED]

are both handled the same way, but assumed the case insensitivity was a feature of the whole enchilada if you know what I mean.

The tricky part is the username -- here sendmail just passes the
username through in whatever case it gets *except* when it does final
delivery (ie. when it passes the message to the local delivery agent).
At that point, it maps the username to lowercase

[snip]


However on unix systems, user 'Marty' is not
automatically the same as user 'marty' or as user 'MARTY'.

If I understand correctly you're saying that by and large, modern Unix systems are case sensitive but since email is not the mailbox name e.g. 'Marty' is converted to lower case at some point in processing even if mixed case is used by the person sending the email properly wrt the server's config it will still fail unless everything's all lower case because of the case conversion done behind the scenes?


It is possible to set up sendmail to preserve the case of usernames
but doing so would mean your mail system wouldn't be standards
compliant, so I'll keep quiet on the issue -- unless anyone really
does have a burning desire to know how?

Not me, because that would mean [EMAIL PROTECTED] would be a different address than [EMAIL PROTECTED], right? I have to agree that this is not imo a good thing.


However it would be nice if any comparisons that get poisoned by the case conversion were themselves case insensitive e.g. uid =~ /$uid/i [in Perl] so that I could still have Marty as a user on my server. This does seem to help explain why on my web accounts my uid is case insensitive. Albeit they must have an lc convertor on the front end because mixed case works as well as lower case.


Marty Landman Face 2 Interface Inc 845-679-9387 Sign On Required: Web membership software for your site Make a Website: http://face2interface.com/Home/Demo.shtml

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