Hi,
I have a problem on an Exchange 2013 server (CU23). Automatic absence messages (OOF) are not sent to external senders (no problem internally).
Here is the error message that appears on each attempt:
{[{LRT=};{LED=501 Syntax error in parameters or arguments};{FQDN=};{IP=}]}
Only one send connector is configured (MailJet) in authenticated mode.
When I use a send connector without using SMTP relay, OOF messages are sent correctly.
I haven't tested other SMTP relays, but I think it's more related to the Exchange server because nothing goes out to MailJet (nothing in the logs).
Here is what I tested:
- Server reboot
- re-creation of the send connector
- disable of the transport agent "DKIMSigner" which was in low priority
- checking Exchange services (all started)
I don't know how long the problem has been present.
Do you have an idea ?
Thanks in advance