[Apakabar] Undeliverable mail: Mail Delivery (failure mattias.sjoberg@swipnet.se)

[MAILER-DAEMON at mailfe01.swip.net]

Failed to deliver to 'mattias.sjoberg at swipnet.se'
SMTP module(domain old.swip.net) reports:
 host old.swip.net says:
 550 Invalid recipient: <mattias.sjoberg at swipnet.se>

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