We found one dictionary that defines the word opt in mailing list:

Computing (1 matching dictionary)

1. opt-in mailing list: CCI Computer

▸ Words similar to opt in mailing list ▸ Usage examples for opt in mailing list ▸ Idioms related to opt in mailing list ▸ Wikipedia articles (New!) ▸ Words that often appear near opt in mailing list ▸ Rhymes of opt in mailing list ▸ Invented words related to opt in mailing list