Extracting CLIENTID information from checkpassword or postlogin scripting

[Dan Conway]

Hello,

When extracting client_id information from the client connection (i.e. 
setting imap_id_log = *) the information is directly logged by Dovecot 
as such:
ID sent: name=Thunderbird, version=91.5.0

My question is, Is it possible to export/set this information in a 
checkpassword script or a postlogin script?

client_id

	

If|imap_id_retain| 
<https://doc.dovecot.org/settings/core/#core_setting-imap_id_retain>is 
enabled this variable is populated with the client ID request as IMAP 
arglist.

I've enabled both checkpassword and postlogin on a test server, as well 
as 'imap_id_retain' set to 'yes'. I wrote a simple Perl script that 
dumps everything in %ENV as well as @ARGV for checkpassword and 
postlogin, but I don't see any occurrences of ID information. I've also 
tried to see if I could supply that variable in dovecot.conf by setting 
'client_id' as a parameter, but that didn't seem to do the trick either.

passdb {

...

    # Doesn't work
    args = /usr/local/bin/checkpassword.pl client_id

    # Doesn't work
    args = /usr/local/bin/checkpassword.pl %{client_id}

...

}

What am I missing? Is it possible to get these variables into an 
external script that checkpassword or postlogin executes?

Thanks.
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