Rainloop: gmail messages are not delivered

Hello,

When I send a gmail message to my Rainloop mailbox, the message never arrives in my inbox. Ditto for orange.
I am on VPS at Hostinger, CentOS 7 and Cyberpanel. I am also looking to redirect my webmail address in the form [https://193.46.xxx.xxx:8090/rainloop/] to [https: //www.mondomaine/webmail/].

thank you in advance
Claude

Excuse me, I did not put my message in the right place!

I added in the DNS TXT zone, the following instruction: v = spf1 a mx ip4: 193.46.xxx.xxx include: _spf.google.com ~ all

Thank you in any case for your return,

Claude