I have a problem, some email servers dont accept my emails.
firstname.lastname@example.org: host mail.delfzijlrp.nl[18.104.22.168] said:
550-Verification failed for email@example.com 550 Sender verify
failed (in reply to RCPT TO command)
That is what i get when i sent an email to another webserver.
And when i send to hotmail i get a email back that a part of the providers network is on a blacklist.
When i send to gmail, the email will get into the spam folder.
I checked aswell as my network provider and we cant find that this ip or subnet is blacklisted.
If i go to DNS configuration in the https://mail.stefanvt.nl/ interface and check them, everything comes back fine.
My mailserver ip is: 22.214.171.124
Im hosting this on my own server that runs in a datacentre.
Maybe someone can help me with this.