My campaigns are suddenly not being delivered to Outlook email accounts; any thoughts?
Hi pday077, welcome to the forums. It's really hard to say what the issue may be without viewing your email campaigns, so could you kindly contact our support team with client details and a link to a recent campaign that experienced these delivery issues?
There is the possibility that something in the campaign content may be triggering Outlook's junk mail filter. Usually this is through the unintentional use of words and phrases that Outlook may consider to be 'suspicious', but it's really hard to know for sure without seeing the campaign.