Send out a re-engagement campaign. Users who want your mail will opt in again and those who don’t (or never signed up in the first place) will be olutionretired from your active sending list. Re-engagement Campaign Tips S

Send out a re-engagement campaign. Users who want your mail will opt in again and those who don’t (or never signed up in the first place) will be olutionretired from your active sending list. Re-engagement Campaign Tips S