Does volume cause blocking?

There seems to be a never ending debate about volume and how it affects delivery and revenue. I regularly get questions asking if ISPs block senders just for volume.
The answer is no. Unless you’re actually sending enough mail to overwhelm the incoming infrastructure, something that’s difficult on today’s internet, you’re unlikely to be blocked due to simply sending a high volume of mail.
Sending mail recipients don’t want, or mail that looks like spam, that will get the mail blocked or filtered.

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Censoring email

It seems some mail to Apple’s iCloud has been caught in filters. Apparently, a few months ago someone sent a script to a iCloud user that contained the phrase “barely legal teen” and Apple’s filters ate it.
The amount of hysteria that I’ve seen in some places about this, though, seems excessive. One of my favorite quotes was from MacWorld and just tells me that many of the people reporting on filtering have no idea how filters really work.

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Does mail volume contribute to blocking?

There are two extreme opinions I see among marketing agencies and email senders when it comes to volume.
One group seems to think that volume alone triggers blocks. Another group thinks volume never affects delivery.
As with many things in delivery reality is at neither extreme.
Sending lots of mail isn’t the problem. Sending lots of mail your recipients aren’t interested in getting is the problem. Last year during the US political elections the Obama campaign, for instance, sent lots and lots of mails. Their list was an order of magnitude larger than the Romney campaign and there were days they were sending 10s of mails per subscriber. It was a deluge. But they were smart, and they did a lot of data mining and they did it in a way that got recipients to act on the mail. That mail was a deluge, but it was a wanted deluge by most of the receivers.
For a lot of vendors, too, increasing volume does increase response and revenue and all the things you want to drive with email marketing. But there will be people who don’t like the increase in volume. If they’re not valuable customers, no great loss. If they are valuable customers, then the increase in volume may drive a decrease in revenue.
In terms of inbox delivery, it’s not the volume it’s how wanted the mail is. Send wanted, interesting and engaging mail, you can send dozens of times a day.
No, volume alone doesn’t contribute to delivery problems.

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Spam is not a moral judgement

Mention an email is spam to some senders and watch them dance around trying to explain all the ways they aren’t spammers. At some point, calling an email spam seems to have gone from a statement of fact into some sort of moral judgement on the sender. But calling an email spam is not a moral judgement. It’s just a statement of what a particular recipient thinks of an email.
There are lots of reasons mail can be blocked and not all those reasons are spam related. Sometimes it’s a policy based rejection. Mailbox providers publishing a DMARC record with a reject policy caused a lot of mail to bounce, but none of that was because that user (or that mailing list) was sending spam. Most cable companies prohibit customers from running mail servers on their cable connection and mail from those companies is widely rejected, but that doesn’t mean the mail is spam.
Sometimes a block is because some of the mail is being sent to people who didn’t ask for it or are complaining about it. This doesn’t make the sender a bad person. It doesn’t make the sending company bad. It just means that there is some issue with a part of the marketing program that need to be addressed.
The biggest problem I see is some senders get so invested in convincing receivers, delivery experts and filtering companies that they’re not spammers, that they miss actually fixing the problem. They are so worried that someone might think they’re spammers, they don’t actually listen to what’s being said by the blocking organization, or by their ISP or by their ESP.
Calling email spam isn’t a moral judgement. But, if too many people call a particular email spam, it’s going to be challenging to get that mail to the inbox. Instead of arguing with those people, and the filters that listen to them, a better use of time and energy is fixing the reasons people aren’t liking your email.

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