But what if you're not in retail? What if the emails you need to send in November and December don't care that it's a holiday? You've got newsletters to distribute, conference seats to fill, annual memberships to renew, software upgrades to announce,  year-end feedback surveys to distribute.... How can you compete with the tsunami of "Free Shipping, today only!" and "25% off through Monday" offers set to flood your subscribers' attention span?

To break through inbox Q4 clutter with your holiday-agnostic emails, try these tactics:

Zig when retailers zag. You know all those best practices about the best days and times to send that you've spent the past 10 months learning, testing and perfecting? Ignore them. If it's a best practice, expect many of your inbox rivals to follow it, which only increases the noise you have to rise above. Try sending your messages on what you previously believed (or were told) are the worst sending days and times. Your audience may be smaller, but the inboxes won't be as full. Better to be one of 10 messages reaching a smaller group, than one of 100 messages "optimized" for delivery at the same time.

Marginalize other messages with an alternate inbox. A slew of messages from other companies doesn't mean your subscribers want to hear from you any less. But they're human, and have a finite capacity for information consumption. Let them know that if the inbox you normally mail to becomes too crowded with holiday offers, that you are happy to temporarily mail to a separate email address, making it easier for them to distinguish your communications from the relentless holiday pitches. You may not get gigabytes of takers on this offer, but know that every one you do is highly engaged and wants to stay that way. They're worth the extra effort.

Emphasize the white list. As volume goes up, mailbox administrators may well tighten the reins on what messages actually make it through. Now is the time to turn up the volume on your "please whitelist us" requests and instructions. Add it to your current messages and consider a dedicated message expressly on the need for whitelisting in advance of the holiday barrage.

Convince your copywriters that the holiday has been cancelled. It's pretty easy to fall into a seasonal tone with an email's copy and subject lines -- even if your emails don't have anything to do with the holidays. Resist the urge. A co-opted holiday tone won't make your message more relevant this season. It may match the season, but it also matches the hundreds of other messages you want to differentiate from. And it doesn't match your message content. Put your best Grinch on and tell your copywriters that the entire holiday season has been cancelled, and that any references to turkey, mistletoe, sleighs, candles and singing will be summarily edited out of the finished message.

You're not going to outspend, outmuscle or outshine retailers for whom holiday emails are a mission-critical operation. Competing head-to-head for inbox supremacy over the next couple of months is futile. You can't win, so change the game wherever you can. Test tactics that allow you to remove yourself from the competition, and focus instead on your subscribers. It could be a very happy holiday for you, after all.

Not that your emails care, of course.