We have had an email newsletter campaign which has been running for months without any problems.
Here’s what we’ve got:
- Advertiser has a different banner for each day of the week, so we cannot set a default banner.
- Each banner is set with a chain of 50 and a priority of 100
- The ad which appears on Friday also runs on Saturday and Sunday
Within the last two weeks, we’ve getting default ads appearing in that ad zone on a few computers inside the office. The sales rep claims that he’s seeing it happen outside the office, but no advertisers are complaining … and I have been checking emails outside the office and am not seeing it happen.