554 Transaction Failed Spam Message not queued

omzeyad used Ask the Experts™
Dear all

today I experienced a weird problem with the following domain

users in our domain were sending and receiving to each other ,one day our users tired to send to the same domain but got the following message :

554 Transaction Failed Spam Message not queued

then I tried to send from my mailbox to the same domain ,the mail was sent then I told the user to try to send again and the mail was send ,all that happened in one day

can anyone explain to me what happened
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Probably something on the recipient's end.  Maybe they are playing around with new spam filtering software.
Did this ever get resolved?


yes it was resolved but I don't know what is the cause of the problem.

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