Contacts not receiving our marketing emails

1. Request their IT/EMail team add the the following email domains to their allowlist
   1. stavis.com
   2. share.hubspot.com
   3. hubspotemail.com
2. Request their IT/EMail team add the following Hubspot IP addresses to their allow list
   

   54.174.60.0/23

   143.244.80.0/20

   18.208.124.128/25

   54.174.53.128/30

   158.247.16.0/20

   54.174.59.0/24

   54.174.63.0/24

   3.93.157.0/24

   54.174.52.0/24

   139.180.17.0/24

   54.174.57.0/24

3.  Or for more info visit this link from Hubspot
   https://knowledge.hubspot.com/email/contacts-not-receiving-your-marketing-emails#add-marketing-email-sending-ip-addresses-to-an-allowlist