I tried to send myself and email from work to home and I received and email back stating that is was returned undeliverable. I have gotten notices from others trying to send me email getting this same thing. My email provider is Spectrum, I have reached out to their tech support and was told the following
Okay, the ip address is listed as spam from a site. Here is the link to see that info. https://www.spamhaus.org/query/ip/98.149.86.7
You will need to contact the service that listed the ip as spam. Go to: whatismyipaddress.com/blacklist-remove
Something you sent out was marked as spam, and has been blocked.
Click there, it will how you where it is listed, and that is who you contact to have it removed or "whitelisted"
It is the ip address that is listed, which your email is connected to.
Yes you will need it unlisted or whitelisted to have the email concerns resolved.
This Message was undeliverable due to the following reason:
Each of the following recipients was rejected by a remote mail server.
The reasons given by the server are included to help you determine why each recipient was rejected.
You might want to look into your spectrum email settings. I found that this email address was added to my mail filters by a d-bag to forward purchase requests and password resets to their email account. When you account is hacked, they then think you will use the same username and password combos on other sites. They then try to get into the other sites, like amazon, best buy wal-mart, etc. They try password resets if the password is not the same. They add filters to your emails so that you don't see the emails in your inbox.
log into your webmail.spectrum.com with your email as username. Then go into Settings->Filters and Blocked Senders. You might see the filters.
Likely the email you sent to yourself had a keyword that matched the filter, that then forwarded the email to the address and bounced.