Problem sending emails

Hello everyone, I have problems sending emails, I already have SPF, DKIM and DMARC configured. I did a test from gmail to hestia and I received it without any problem, but when I try to send emails it appears as sent in the outbox but I don’t receive the email I sent from hestia.

I have these ports open: 22, 80, 443, 8443, 8447, 8083, 25, 465, 587, 143, 993, 110, 995.

Even the website loads fine with no issues.

I have satisfactory tests in also in mxtoolbox, in dnschecker.

I don’t know what else to do, please someone who can help me. Thank you.

Does this work?

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I was able to solve the problem, I have IONOS and I made the request to open port 25.

But now I have another situation, the emails arrive as spam.