Are there any ways to minimize or prevent your emails being marked as spam by the recipient?

Can’t do anything about it except switch to a different email provider or tell your email recipients to make an exception for your email.

Give them a call and let them know that you sent them an e-mail and that if they didn’t get it, they might want to check their spam folder. I check my spam folder regularly to make sure that there are no names that I recognize in there. Its probably the only way to make sure that people get something important if they have a habit of not responding to things.

Inside of the email put “cialis viagra penis pump make love”. Those always tend to get past my spam filter :(

I always check my spam folder simply because I rarely get spam (and sometimes Gmail is like, Woah, you’ve gotten 10 emails from LOLcats, today, maybe that’s spam!).

If it is a business thing, you might send a follow up letter to ensure that they will check for it and keep it out of the spam folder.

You could also ask for a confirmation of receipt, and those that don’t confirm, make a different email address to send from asking to look for the other email and mark it as “Not Spam”.