What non-standard behaviour features does Gmail exhibit, when it is programmatically used as a POP3 server?

Posted by Mike Green on Stack Overflow See other posts from Stack Overflow or by Mike Green
Published on 2010-12-25T16:25:59Z Indexed on 2010/12/25 16:54 UTC
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I am trying to prepare a complete list of behaviour that Gmail POP3 exhibits, that you wouldn’t expect to generally find in a POP3 server.

For example, Gmail appears to ignore the DELE (delete) command from a POP3 client. Instead, it implements its own delete and archive strategy.

The purpose of preparing a list is to avoid developers testing a POP3 client against the Gmail POP3 server and then assuming that all POP3 servers behave in the same way.

Can anyone provide a more complete list of non-standard behaviour?

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