#3603 Attempt to Create Alias produces Error in postfix-lib.pl

[Douglas Beattie Jr.]

(Webmin 1.500) Postfix Mail Server --> Mail Aliases --> Create a new alias
(populate the form...)
Description: Support Alias
Address: support
Enabled?: Yes
Alias to: [email address] randy@sharkbait.biz

(submit... https://sharkbait.biz:10000/postfix/save_alias.cgi\)
Error - Perl execution failed
Modification of non-creatable array value attempted, subscript -1 at ./postfix-lib.pl line 488.

[Jamie Cameron]

In your /etc/postfix/main.cf file, what does the alias_maps= line contain?