Problem with sending emails (Sender address rejected)

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radi27
Posts: 2
Joined: Thu Dec 12, 2019 1:22 am

Problem with sending emails (Sender address rejected)

Post by radi27 »

Hello guys,

I am having a strange issue with Zimbra Community. Version is: 8.8.10_GA_3801.FOSS.

It was working fine until the point where we decided to install a SMTP relay (smarthost). We followed instructions and it worked, but ultimately we decided to remove it. That's when problems arised with sending email.

Now I can send 4-5 emails randomly, and on the next, I'll get an error that looks like this.

Code: Select all

Message not sent; one or more addresses were not accepted.
Rejected addresses: receiver-name <receiver-name@receiverdomain.com>
method:	[unknown]
msg:	Invalid address: receiver-name <receiver-name@receiverdomain.com>. com.zimbra.cs.mailbox.MailSender$SafeSendFailedException: MESSAGE_NOT_DELIVERED; chained exception is: com.zimbra.cs.mailclient.smtp.InvalidRecipientException: RCPT failed: Invalid recipient receiver-name@receiverdomain.com: 450 4.7.1 <sender-name@senderdomain.com>: Sender address rejected: Access denied
code:	mail.SEND_ABORTED_ADDRESS_FAILURE
detail:	soap:Sender
trace:	qtp1286783232-3921:1660038312219:49602891b7c3f69c
request:	
Body: {
  SendMsgRequest: {
    _jsns: "urn:zimbraMail",
    m: {
      e: [
        // [0]:
        {
          a: "receiver-name@receiverdomain.com",
          p: "receiver-name",
          t: "t"
         },
        // [1]:
        {
          a: "sender-name@senderdomain.com",
          p: "sendername",
          t: "f"
         }
       ],
      idnt: "533fc158-7737-498c-b00c-0780782b5ce6",
      mp: [
        // [0]:
        {
          ct: "multipart/alternative",
          mp: [
            // [0]:
            {
              content: {
                _content: "test2121 
"
               },
              ct: "text/plain"
             },
            // [1]:
            {
              content: {
                _content: "<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>test2121<br data-mce-bogus="1"></div></div></body></html>"
               },
              ct: "text/html"
             }
           ]
         }
       ],
      su: {
        _content: "test2121"
       }
     },
    suid: 1660038254065
   }
 },
Header: {
  context: {
    _jsns: "urn:zimbra",
    account: {
      _content: "sender-name@senderdomain.com",
      by: "name"
     },
    authToken: "(removed)",
    csrfToken: "0_c5268cfa5532611497f305a2ca23703270452f2f",
    notify: {
      seq: 6
     },
    session: {
      _content: 112190,
      id: 112190
     },
    userAgent: {
      name: "ZimbraWebClient - GC103 (Win)",
      version: "8.8.10_GA_3786"
     }
   }
 }
The receiver is an external email account, sender is hosted on Zimbra. This is happening randomly, few emails would work fine, then we get the error for few emails and so on.

Any ideas on what could be causing this or what to check?
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