Hello I can recieve mail internally and externally but can only send mail internally, whenever i try to send mail externally i get the following error in the message queue:
454.4.4.0 Primary target IP address responded with: "421.4.2.1 Unable to connect." Attempted failover to alternate host, but that did not suceed. Either there are no alternate hosts, or delivery failed to all alternate hosts.
Delivery Type= DnsConnectorDelivery
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I have three accepted domains:
INTERNAL AD DOMAIN
EXTERNAL DOMAIN.net
mail.EXTERNAL DOMAIN.net
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I have 1 Send Connector as follows:
FQDN for response to HELO or EHLO : mail.EXTERNAL DOMAIN.net
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Type: SMTP
Address Space: com (Include all Subdomains)
Cost:1
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Network:
Use Domain name system (DNS) "MX" records to route mail automatically
Use the External DNS Lookup Settings on the transport server
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I Suspect that my send connector is misconfigured but am stuck as to where, any help greatly appreciated!
Regards
Wayne GIllard