Thanks for joining us in the Community! This a great question. Welcome emails would be sent to contacts that join your list via sign up forms. For more information on this, please visit our help guide relating to this here. Please let us know if you need further assistance!
Hello @HavaneseRescueInc ,
If you were to manually import that contact or if they're added through a 3rd party tool, the Welcome email would not be triggered. However, if you email us the email address of the contact(s) that did not receive your welcome email to social_support(at)constantcontact(dot)com we can look into that further for you.
Thank you @HavaneseRescueInc! We received your email as well and will follow up there.