JAY Concertinas

[Alan.W]

Has anyone got an email address for Edward Jay in Australia, or his representative in UK. Thanks. PM's please. 

[John Wild]

1 hour ago, Alan.W said:

Has anyone got an email address for Edward Jay in Australia, or his representative in UK. Thanks. PM's please. 

Edward.Jay@mac.com

 

The email address on his website is still valid, but check the capital letters - they may be lower case.

[Clive Thorne]

2 hours ago, John Wild said:

Edward.Jay@mac.com

 

The email address on his website is still valid, but check the capital letters - they may be lower case.

I think that email address have not been case sensitive for many years, if ever, so that shouldn't be a problem.

[Richard Mellish]

11 hours ago, Clive Thorne said:

I think that email address have not been case sensitive for many years, if ever, so that shouldn't be a problem.

That is also my understanding -- whereas URLs are case sensitive.

[Paul_Hardy]

Being pedantic, the domain part of an email address (after the @) is defined by the Internet specifications to be case insensitive (paulhardy.net and PaulHardy.Net are the same host). But the part of the email address before the @ (the 'local-part' in RFC 5321 and 5322) is defined to be case sensitive, so paul@ and Paul@ could be different users.

 

However the RFC 5321 specification says:

"The local-part of a mailbox MUST BE treated as case sensitive. Therefore, SMTP implementations MUST take care to preserve the case of mailbox local-parts. In particular, for some hosts, the user "smith" is different from the user "Smith". However, exploiting the case sensitivity of mailbox local-parts impedes interoperability and is discouraged."

 

In practice almost all email systems these days will wrap case-differing local-parts (paul@, Paul@)  to lowercase, so case doesn't matter. Indeed several major email systems (such as gmail and hotmail) will do more drastic convergence, such as removing common non-alphabetic  characters, so John.Smith becomes johnsmith.

 

Overall, its probably best to put the whole of an email address in lower case, but you are unlikely to have problems if you don't.

[Clive Thorne]

On 3/7/2026 at 5:54 PM, Paul_Hardy said:

Being pedantic, the domain part of an email address (after the @) is defined by the Internet specifications to be case insensitive (paulhardy.net and PaulHardy.Net are the same host). But the part of the email address before the @ (the 'local-part' in RFC 5321 and 5322) is defined to be case sensitive, so paul@ and Paul@ could be different users.

 

However the RFC 5321 specification says:

"The local-part of a mailbox MUST BE treated as case sensitive. Therefore, SMTP implementations MUST take care to preserve the case of mailbox local-parts. In particular, for some hosts, the user "smith" is different from the user "Smith". However, exploiting the case sensitivity of mailbox local-parts impedes interoperability and is discouraged."

 

In practice almost all email systems these days will wrap case-differing local-parts (paul@, Paul@)  to lowercase, so case doesn't matter. Indeed several major email systems (such as gmail and hotmail) will do more drastic convergence, such as removing common non-alphabetic  characters, so John.Smith becomes johnsmith.

 

Overall, its probably best to put the whole of an email address in lower case, but you are unlikely to have problems if you don't.

Every day a school day. Although my brain has now gone into a terminal tail spin!😁

Edited March 9 by Clive Thorne

[David Barnert]

On 3/7/2026 at 3:13 AM, Richard Mellish said:

That is also my understanding -- whereas URLs are case sensitive.

 

Naw...

 

cOnCeRtInA.nEt

 

Edited to add: WiFi and log-in passwords are case sensitive. I can’t think of anything else internet related that is.

Edited March 9 by David Barnert

[DaveRo]

https://concertina.net/forums/

https://concertina.net/FORUMS/

 

Edited to add: like email addresses, only the domain is case insensitive. But, like with email providers, a website could choose to make the rest of the address case insensitive. The c.net web server doesn't.

Edited March 9 by DaveRo

[Richard Mellish]

One of my favourite quotations is from a colleague at a conference many years ago. "If you are not yet confused, you are not yet informed."

[Clive Thorne]

Similar to "If you can stay calm when all around you are losing their heads, then you clearly don't understand the situation"