[lukr]

well. it works for me. Some ppl say its weird/strange/c***/etc. And some other ppl like it.
Mail filters sometimes can act strangely, but after reading the mail filter tutorial at Opera's website i could set it up properly.
Can handle large amount of mails&RSS messages without slowing down.

Give it a try.

As for web-based mails i use one Gmail account for some high traffic mailing lists, and as a "storage" for mails/links/files i might need when im not at home.