Date: Wed, 12 Jun 2019 17:31:48 +0100 From: Matthew Seaman <matthew@FreeBSD.org> To: freebsd-questions@freebsd.org Subject: Re: email whitelist suggestions Message-ID: <d316ae9d-26f0-0787-e87d-99c298d46811@FreeBSD.org> In-Reply-To: <20190612152808.GA88512@skytracker.ca> References: <20190612152808.GA88512@skytracker.ca>
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On 12/06/2019 16:28, David Banning wrote:
> I changed the IP address for my server recently having changed my ISP, and now mail from my server is getting continuously filtered into peoples spam folders.
>
> I check my ip address on mxtoolbox.com fairly regularly - my IP never appears on a blacklist.
>
> So now I'm thinking whitelist - but I don't have the money to lay out for this type of thing - at least not a large amount.
>
> Anyone have a suggestion as to how to resolve my problem?
>
I assume you have
- ensured your mailserver address is both forward and reverse
resolvable in the DNS. Without a valid PTR record you aren't
going to have much fun trying to do SMTP
- Have updated SPF and DMARC records in the DNS to account for the
new IP number
- Have waited long enough for all the DNS TTLs to expire and the
changed data to populate caches.
Whitelisting is unlikely to help you very much. You'll find that all
the usual methods to improve deliverability will give you the best results.
It's also pretty important that your mail server name doesn't look like
its a typical dynamically assigned residential address. Those are
marked down by receiving systems on the basis that most e-mail
originating from such locations is the result of virus infected hardware.
In principle you might run afoul of not having established a good
reputation for your new IP. In practice, if you're running a low volume
system just for personal e-mail, reputation scoring is pretty unlikely
have any effect on you. It's worth checking though. It is always
possible that the previous user of your new IP number sent oodles of
spam from it and has tarnished its reputation for a long time to come.
Cheers,
Matthew
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