Everything was working fine, no changes to DNS or Email Server settings.Then we got the error below when some users (not all) send emails (some user and domain names and ip's have been changed). De: MAILER-DAEMON [mailto: MAILER-DAEMON] Enviado el: lunes, 25 de junio de 2012 p.m.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at ) if sending one of the latter errors would provide information about the intended recipient's network availability to an entity that is not authorized to know such information (for a more detailed discussion of presence authorization, refer to [XMPP‑IM] The requesting entity is not authorized to access the requested service because a prior subscription is necessary (examples of prior subscription include authorization to receive presence information as defined in [XMPP‑IM] The error condition is not one of those defined by the other conditions in this list; any error type can be associated with this condition, and it SHOULD NOT be used except in conjunction with an application-specific condition.
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1) If this is a cluster, edit configuration so all servers use the same validation Key and validation algorithm. 2) Viewstate can only be posted back to the same page.
Deserialize(String input) 60[Http Exception (0x80004005): Authentication of viewstate failed.
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