If you are having trouble sending mail to our network
or you have received unsolicited bulk email from one of our customers,
please get in touch with us and we will try to resolve this matter as soon
as possible. To contact us either write to postmaster-at-tsunamihost.ch
or use the contact form provided at the end of this page.
Currently Enforced Rules
Following rules are currently enforced on our
mailservers:
Rule
Error Message
Explanation
MAIL FROM
553 sorry, your envelope sender domain must exist
You must provide a valid mail
address as sender in the mail envelope. Your address is considered
to be valid if the lookup for an MX record succeeds.
Reverse DNS
451 bad reverse DNS
Your IP must have a valid reverse DNS (PTR) record.
