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https://issues.apache.org/jira/browse/NUTCH-1861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16593916#comment-16593916
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Yossi Tamari commented on NUTCH-1861:
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Hi Lewis,
I have a some questions:
# Isn't SMTP only for sending (and relaying) messages? How can it be used for
crawling?
# I assume crawling in this instance will be in the context of a specific user
(with password), but this user may have access to multiple mailboxes/folders
(at least with IMAP, I don't think POP3 supports such features). Do you intend
to support multiple users/passwords?
# Why did you choose Commons Net over
[JavaMail|https://javaee.github.io/javamail/]? Is it a license issue? I think
the implementation would be much easier with JavaMail (it is a much
higher-level API, I believe).
Regarding your question, I suspect that any users will only be using one
protocol or the other, so putting them in one plugin is only useful if there is
a lot of common logic in the implementation (which may be the case). Personally
I would only consider IMAP (maybe) worth implementing, as I think all servers
support it today, and POP3 is just too limited.
> Implement POP3 Protocol
> -----------------------
>
> Key: NUTCH-1861
> URL: https://issues.apache.org/jira/browse/NUTCH-1861
> Project: Nutch
> Issue Type: Task
> Components: protocol
> Reporter: Lewis John McGibbney
> Assignee: Lewis John McGibbney
> Priority: Major
>
> Implementing the Post Office Protocol within Nutch would open up a new use
> case which is crawling and indexing of some mail servers.
> This is particularly useful for investigation purposes or for porting/mapping
> mail from one server to another.
> We *may* be able to kil two bird with the one stone by implementing both IMAP
> and POP3 protocols under the one plugin.
> http://commons.apache.org/proper/commons-net/
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