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Posted by: Lemonde - 01 December 2020 13:58:24
What is causing these rejection messages? Log Name: Application Source: MSExchangeTransport Date: 01/12/2020 12:37:38 Event ID: 1021 Task Category: SmtpReceive Level: Warning Keywords: Classic User: N/A Computer: server-EX1.server.local Description: Receive connector mail.server.co.uk rejected an incoming connection from IP address 168.245.1.20. The maximum number of connections per source (20) for this connector has been reached by this source IP address. Event Xml: 1021 3 1 0x80000000000000 1142871 Application server-EX1.server.local mail.server.co.uk 20 168.245.1.20

Posted by: Lemonde - 01 December 2020 13:59:35
We are running AVG email scanner on our Exchange 2007 box btw And are also seeing this, which is presumably an AVG generated message on EX2007 Log Name: Application Source: MSExchangeTransport Date: 01/12/2020 12:23:06 Event ID: 1022 Task Category: SmtpReceive Level: Warning Keywords: Classic User: N/A Computer: server-EX1.server.local Description: Anti-spam agents are enabled, but the list of internal SMTP servers is empty. If there are any MTAs between this server and the Internet, populate this list by using the Set-TransportConfig cmdlet in the Exchange Management Shell. Event Xml: 1022 3 1 0x80000000000000 1142800 Application server-EX1.server.local mail.server.co.uk 5000