Remove subdomain from the From address to allow mails on IONOS hosting. (See: https://torstenlandsiedel.de/2024/02/26/mailprobleme-bei-ionos-mit-subdomains/) Remove subdomain from the From address to allow mails on IONOS hosting. (See: https://torstenlandsiedel.de/2024/02/26/mailprobleme-bei-ionos-mit-subdomains/) - fix-ionos-mail.php

Unfortunately, you can no longer mail from subdomains on IONOS hosting. I have therefore modified my solution so that anyone can use it directly (without having to enter the mail itself):
gist.github.com/Zodiac1978/0...

#IONOS #Mailproblems #Subdomain