Hi @Ayelen_Rives 
Maybe try allow-listing your company IP address in the screened email list at admin / logs / screened_ip_adderesses. It sounds like you are all using the company IP address and max_logins_per_ip_per_minute is being exceeded.
Hi @Ayelen_Rives Maybe try allow-listing your company IP address in the screened email list at admin / logs / screened_ip_adderesses. It sounds like you are all using the company IP address and max_logins_per_ip_per_minute is being exceeded.