Usernames with "+" in it

Michael Loftis mloftis at
Wed Sep 6 13:44:35 EDT 2006

That will likely prove to be far more trouble than it's worth.  Both Cyrus 
and most Unix MTA's treat + as a seperator/extender, so == 
info (but tells cyrus to try to file it into the folder if 
permissions allow)....

It's certainly possible to login as that user, the problem comes in 
delivery, you'll need to change or disable the + separator in your MTA and 
in Cyrus.  Then you can have usernames with + in them.  Better though to 
just follow the 'de facto' standards, use .'s as separators in usernames.

--On September 6, 2006 3:51:01 PM +0200 Sven Lepiorz 
<ml_cyrusinfo at> wrote:

> Hi,
> we have to take over all mailboxes from an other provider to our own
> server. The login names on the old provider is nearly the full email
> address but with a "+" instead of "@", i.e. How can i
> deliver mail to such a user? Or is it possible to login with the username
> but act as an other user?
> Sven
> ----
> Cyrus Home Page:
> Cyrus Wiki/FAQ:
> List Archives/Info:

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into trouble of all kinds."
-- Samuel Butler

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