This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Undelivered Mail: 501 Syntax error in parameters or arguments

Hello everybody,

we send and receive mail via sophos central
We have been receiving the following message more and more frequently for about 1 week:

"host ***** refused to talk to me: 501 Syntax error in parameters or arguments"

The message does not only come from a recipient/host. Other senders can then successfully deliver to this recipient/host.

In the last report, we have now found out that it was sent by a sophos node that is on a blacklist. but then should the error message look different?

 

best regards

Tolik



This thread was automatically locked due to age.
Parents
  • I have the same issue and believe that through transport some mail header fields are being shiftet. I had a support case open but that did not lead to any solution as they just blamed the recipient server to cut the connection.

    Also the subject line "date:subject:to:from;" shows that there is something messed up with the header fields.

    Did anyone find a solution to this?

Reply
  • I have the same issue and believe that through transport some mail header fields are being shiftet. I had a support case open but that did not lead to any solution as they just blamed the recipient server to cut the connection.

    Also the subject line "date:subject:to:from;" shows that there is something messed up with the header fields.

    Did anyone find a solution to this?

Children
No Data