Not receiving email from two new senders

I use Outlook on my Samsung phone and laptop. I'm receiving all other emails. I've checked my email on the Outlook app, on the Outlook website and Xfinity website. I've also checked spam/junk on each. 

@user_haywa4 Here are some steps you can take to avoid missing emails. Make sure that the default settings of the program, website or mobile device that you're using to get the email doesn't delete email messages from the server automatically. Some email applications, devices and services like Outlook might delete mail from their server. Also check that you are set up as IMAP to keep emails in sync across devices. If you are still using POP settings, emails might not be saved on the server after being read. See here to see instructions to make the switch. Check if you see a security toggle in the email settings that allows you to enable/disable access to third-party email clients. Lastly check the spam settings.  

I'm already set up as IMAP and my Outlook account isn't set up to automatically delete. I asked the two offices to send to my other email address and I received what I needed. I'm hoping it doesn't happen again. I've had this setup for 15 years and this was a first. Thanks.