[GTALUG] Spamhaus block

[Alex Volkov]

I think this might be it.

You can't set reverse DNS records yourself, so you will need to contact 
your service provider and ask them to change the record for IP 
54.39.185.225 from ip-54-39-185.eu to your mail server dns name.

Alex.

On 2019-02-21 2:43 p.m., Marc Lijour wrote:
>
> I thought I had, and I do. OVH is allocating my PTR in a group of 8 
> addresses (*ip-54-39-185.eu.*). May be that's where the problem lies? 
> I sent a ticket to OVH.
>
> $ dig -x 54.39.185.225
>
> ; <<>> DiG 9.11.4-3ubuntu5-Ubuntu <<>> -x 54.39.185.225
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25851
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 65494
> ;; QUESTION SECTION:
> ;225.185.39.54.in-addr.arpa.    IN    PTR
>
> ;; ANSWER SECTION:
> 225.185.39.54.in-addr.arpa. 5990 IN    PTR *ip-54-39-185.eu.*
>
> https://mxtoolbox.com/subnet/?filter=54.39.185.225/29&source=findmonitors&domain=54.39.185.225 
>
>
> On 2019-02-21 2:17 p.m., Alex Volkov wrote:
>> Do you have reverse DNS records set up -- this is pretty much a 
>> requirement for running any mail server these days.
>>
>> This mailing list kept getting blocked by Spamhaus when we used IPv6 
>> address to send out mail. I have no idea what was wrong with that, 
>> but the minute I turned off IPv6 everything went back to normal.
>>
>> I remember there's an open-source mail config/blacklist checking 
>> website tool, but I don't remember its name.
>>
>> Alex.
>>
>> On 2019-02-21 1:24 p.m., Marc Lijour via talk wrote:
>>> Does anyone has insights about dealing with Spamhaus?
>>>
>>> I'm getting increasingly frustrated by being listed without 
>>> explanation. I run a very low bandwidth mail server and a website 
>>> for my business. I am running postfix with SPF, DKIM, and DMARC. I'd 
>>> like to know what I am missing.
>>>
>>> Spamhaus is very popular which in turn affects Twitter, LInkedIn, 
>>> beyond just the mail.
>>>
>>> Is it possible to run one's own mail server this days?
>>>
>>> ---
>>> Talk Mailing List
>>> talk at gtalug.org
>>> https://gtalug.org/mailman/listinfo/talk
>>
>>

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