More to send and receive mail dating sites
We need to look at seasonal factors: Does your social network move a lot of extra messages around Mother’s Day?
Does your dating site move a lot of extra messages around Valentine’s day?
Let’s assume for the sake of this article that you have an average volume of one million messages per hour with a peak volume of two and a half million messages per hour during your busiest season.
There are indications that SPF (and Sender ID by association) is ineffective but given the low effort required to implement it I would recommend doing so anyway.
While SPF and Sender ID are purely DNS-based, DK and DKIM require an implementation either during message creation or during relay by the MTA and as a result will impact the maximum throughput of your infrastructure (more about this later).
In email marketing there are senders of all shapes and sizes, from small businesses using self-serve ESPs to the largest web properties self-sending to massive user bases.
While only a few senders will reach or exceed volumes of one billion messages per month, the tools and practices needed to achieve such a volume level are applicable to all senders who want to succeed in email marketing.