This question is in reference to Atlassian Documentation: JIRA Service Desk 3.0.x release notes
It already supports it
Yep, since version 1 - See https://confluence.atlassian.com/servicedesk023/setting-up-the-email-channel-733938689.html
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Will it be possible to send attachments to customer by using the Public comments?
Is it possible set restricions on what is sent to customers?
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Set restrictions - yes (but requires some development skills), Send attachments - no (you may use an add-on to achieve it)
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