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clarethomson1
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APPENDing to spam folder is forbidden

I get this error message all the time - any idea how to sort it out please?

APPENDing to spam folder is forbidden (0.001 + 0.000 secs).

 

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Re: APPENDing to spam folder is forbidden

Are you using eMClient by any chance?

You don't sort it.  The makers of eMClient need to.

Tim

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clarethomson1
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Re: APPENDing to spam folder is forbidden

Thanks for your reply.  What is eMClient?  I use Outlook....

Thanks

Clare

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Re: APPENDing to spam folder is forbidden

Which version of Outlook?

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Re: APPENDing to spam folder is forbidden

We also need to know exactly what you were doing to trigger this.

I've just tried with Outlook from Office 365 version 1903 by using a rule to transfer inbound mail to my spam folder - (Something which definitely causes the problem with emClient).  In my case the mail was successfully moved to the spam folder. 

emClient is another email program just like Outlook.

Tim

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Re: APPENDing to spam folder is forbidden

Do we assume that you are using Outlook for Mac?

If so, have you at some time in the past set up a Spam folder within this client and has it now reached it’s limit size? Have you ever done any housekeeping on this Spam folder – like delete the oldest contents?

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Re: APPENDing to spam folder is forbidden

When looking into this @用心棒 and I have looked at the following thread on the internet.

https://dovecot.org/list/dovecot/2016-December/106382.html

IMAP Sieve is used for spam reporting purposes.  Essentially Mail moved from Inbox to Spam in an IMAP client such as Outlook will mark a mail as spam and mail moved from the spam folder to the inbox will unmark it.

There are essentially two methods of adding a message to an IMAP folder (referred to as a mailbox in the IMAP documentation).

APPEND - adds a message to a folder.

From RFC 3501

The APPEND command appends the literal argument as a new message
      to the end of the specified destination mailbox.  This argument
      SHOULD be in the format of an [RFC-2822] message.  8-bit
      characters are permitted in the message.  A server implementation
      that is unable to preserve 8-bit data properly MUST be able to
      reversibly convert 8-bit APPEND data to 7-bit using a [MIME-IMB]
      content transfer encoding.

Whereas COPY - copies a mail from one folder to another.

 The COPY command copies the specified message(s) to the end of the
      specified destination mailbox.  The flags and internal date of the
      message(s) SHOULD be preserved, and the Recent flag SHOULD be set,
      in the copy.

An example of APPEND would be when you send an email - the sent email is also APPENDed to your SENT folder as it does not yet exist anywhere on the server.

On the other hand mail is COPYed to the SPAM folder from the INBOX (with the INBOX copy then being deleted once the COPY is complete to give the impression the mail was moved from one folder to the other).

Some email clients such as eMClient use APPEND when moving mail from the INBOX to the SPAM folder.  This is probably a case of it works so to hell with the standards, however some email servers do reject APPENDing mails to specific folders.  I'm actually waiting for emClient's makers to update their program.

Tun

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