A program sends e-mails when some conditions were provided. There has't been any problem about sending e-mails since today, but today the e-mails aren't sent via an error in SOST; "816 Message cannot be transferred to node SMTP due to connection error (final)".
i resent the e-mails via SOST successfully. there wasn't any problem. But how can i get this error under control? what might be cause of this problem? can somebody help me please?