Hello: >From time to time I get bounces with a text like this one below: [<02>] The reason of the delivery failure was: 550-Callback setup failed while verifying <[EMAIL PROTECTED]> 550-(result of an earlier callout reused). 550-The initial connection, or a HELO or MAIL FROM:<> command was 550-rejected. Refusing MAIL FROM:<> does not help fight spam, disregards 550-RFC requirements, and stops you from receiving standard bounce 550-messages. This host does not accept mail from domains whose servers 550-refuse bounces. 550 Sender verify failed Since I'm a newbie, I have little knowledge on how to solve this. All I can figure out is that there is a misconfiguration on my server, but I don't know wich. Thank you in helping me out with this, Rodolfo Schwarzenberg K.
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