I am always reading and never experiencing this (knockonwood).
I'm self hosting email servers for multiple domains for now nearly 25 years. When moving to a new hoster with new IP addresses (especially Hetzner, as it is cheaper and seems to attract more malicious people), I have to contact Google, Microsoft, Yahoo and one or two other big providers to clear my IP address range. This has to be done only once and usually is resolved within hours (faster for automated sites). The bigger ones have a web page to do this, others can be reached via email and are always replying quite quickly. So after a day, everything works and once it works, this never changes and mail gets accepted.
These servers are being used by multiple users and businesses and none have reported any problems. For decades.
I am only using dedicated servers though and using everything in the book: DNSSEC, DMARC, SPF, DKIM, proper DNS records, TLS with valid certs and a correctly behaving SMTP server...
I'm self hosting email servers for multiple domains for now nearly 25 years. When moving to a new hoster with new IP addresses (especially Hetzner, as it is cheaper and seems to attract more malicious people), I have to contact Google, Microsoft, Yahoo and one or two other big providers to clear my IP address range. This has to be done only once and usually is resolved within hours (faster for automated sites). The bigger ones have a web page to do this, others can be reached via email and are always replying quite quickly. So after a day, everything works and once it works, this never changes and mail gets accepted.
These servers are being used by multiple users and businesses and none have reported any problems. For decades.
I am only using dedicated servers though and using everything in the book: DNSSEC, DMARC, SPF, DKIM, proper DNS records, TLS with valid certs and a correctly behaving SMTP server...