They could change the Mailgum server, the emails fall to SPAM, they could enable the option of connecting multiple emails through SMPT, application password or Oath, I give an example of other platforms for mass mailing and campaigns

They could change the Mailgum server, the emails fall into SPAM, they could enable the option to connect multiple emails through SMPT, application password or Oath I send an image from another platform that I use to send mass campaign emails, they connect to several email providers and even heat up the emails