For example, a user "joeuser" whose normal email address is "firstname.lastname@example.org"
could make up new email addresses like this:
email@example.com firstname.lastname@example.org email@example.com so on. He can then supply such email addresses to others. For example, he could tell his school to use the address firstname.lastname@example.org when sending him email. Then, when email arrives for him, he can have his mail program, if it has the capability, automatically refile the email into the right mail folder.
When this user signs up for correspondence at a web site, he can make up a new email address just for that web site. Later on, if he starts to receive spam at that email address, this may be a good indication that that web site gave his email address to the spammer.
Multiple hyphens are permitted, i.e., an email address like email@example.com will also work, and will cause mail to be delivered to firstname.lastname@example.org.
Any (Old) Classic Linux: SMTP Filtering to Keep Out Spam that is active for an email address is automatically also applied to any corresponding hyphenated email address. Thus, for example, if SMTP filtering is enabled for email@example.com, then it is also automatically enabled for firstname.lastname@example.org.
If you have a custom domain, you may generate hyphenated email addresses in the same way, by adding a hyphenated suffix before the @ character to any email address in your domain. For example: email@example.com, firstname.lastname@example.org, email@example.com, and so on.
If you wish to separately control SMTP filtering for a hyphenated email addresses, simply add each such address (see: (Old) Adding/Removing Email Addresses). Then you can set SMTP filtering status independently for each hyphenated suffix.
Note that email addresses with hyphenated suffixes can be made up at any time,
and you need not explicitly add each one to the mail system. Only if you want to
separately set SMTP filtering or mail forwarding for such an address do you
need to explicitly add it.
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