Anyone know of any research about whether spam filters set a threshold on the number of permitted links from an email?
For example, will most filters accept three, some accept five and none accept more than seven?
If a study doesn't exist, I'd be interested in what other users have found with their campaigns.
I haven't experienced any spam issues with number of links, including sending a campaign with 34 of them (mix of text and image links).
WOW. Thanks for sharing.