Hello,
> It seems I can suddenly neither post to nor receive mails from this
> group...
It was a Yahoo! hiccup. I got your previous message with the following
kindly attached:
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Yahoo! Groups SpamGuard has detected that the attached message to the
owner of the Yahoo! Group Slaviconlang is likely to be spam.
For more information about SpamGuard, please visit our help pages:
http://groups.yahoo.com/local/spamguard.html
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I've checked it and your settings are clearly "Same as group", so no
worry, I think.
Pavel