This message was sent to me personally, but I am replying to the mailing list. I'm not an expert on this stuff - I was just trying to get the detective work started.  :-)

AOL's explanation of the "554 CON:B1" block does seem to say that AOL's filters are scoring messages from your list as likely spam, and they have blacklisted the IP address that is sending out your mailing list's messages. I would guess that other mailing lists on your listserv.dartmouth.edu server are also having their AOL subscribers being blocked, so maybe you need to get in touch with your ListServ site administrator at Dartmouth to ask him/her to get this sorted out with AOL.

Charles

On Apr 23, 2015, at 1:57 PM, William Schults wrote:

> Charles:
>  
> Here’s the error log, with e-mail addresses masked.  The error “554conb1” on the AOL website is described as.
> CON Blocks
> ·         554 CON:B1
> o    The IP address has been blocked due to a spike in unfavorable e-mail statistics.
> I’m guessing this is a spam setting on the AOL side?
>  
> The following 4 addresses are  currently being monitored: (Remember, some addresses may not be subscribers.)
>  
> Err First Last  Address
> --- ----- ----- -------
>   4 04/22 04/22 [log in to unmask]
>                 Last error: 5.2.1 521 5.2.1 : (CON:B1)
>                             http://postmaster.info.aol.com/errors/554conb1.html
>  
>   4 04/22 04/22 [log in to unmask]
>                 Last error: 5.2.1 521 5.2.1 : (CON:B1)
>                             http://postmaster.info.aol.com/errors/554conb1.html
>  
>   4 04/22 04/22 [log in to unmask]
>                 Last error: 5.2.1 521 5.2.1 : (CON:B1)
>                             http://postmaster.info.aol.com/errors/554conb1.html
>  
>   4 04/22 04/22 [log in to unmask]
>                 Last error: 5.2.1 521 5.2.1 : (CON:B1)
>                             http://postmaster.info.aol.com/errors/554conb1.html
>  
> Err=   Number of delivery errors received thus far
> First= Date first delivery error was received (mm/dd) Last=  Date of most current delivery error (mm/dd)
>  
>  
> Subscribers will  be automatically  deleted from  the list  when delivery errors have been  reported for a period  of 6 days or more,  or when more than  100 delivery  errors have  been received,  whichever occurs  first.
> Monitoring will cease after 7 days without any reported errors.
>  
>  
> Note: Manually  deleted subscribers may  remain on the  monitoring report under an alias  address. Such entries will expire eventually.  You do not need to do anything about them.
>  
>  
> Bill Schults
> Co-list-owner, [log in to unmask]

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