[ 01 ]Postmaster
Contact for mail sent from 109.248.251.51.
Reverse DNS chimera.internet1.cz, mail host mail.internet1.cz.
01
Who to contact
- Responsible person
- Karel Minx, mail operations
- Phone, direct line
- +420 702 377 358 Call
- Contact form
- internet1.cz/contact, answered within one working day
- Postmaster
- postmaster@internet1.cz
- Abuse
- abuse@internet1.cz
If mail from our IP address is causing trouble right now, call the number above. For everything else, write to postmaster or use the form.
02
Operator
Internet 1 CZ s.r.o.
Šumberova 345/26
162 00 Praha 6
Czech Republic
IČO 26473003
03
The sending system
- IP address
- 109.248.251.51
- Reverse DNS and HELO
- chimera.internet1.cz
- Mail host (MX)
- mail.internet1.cz
04
What we send
Transactional mail only: account and notification messages for the communities and services we host. We send no bulk marketing, and we never buy lists.
05
Policies
- SPF and DKIM on every sending domain.
- DMARC published.
- STARTTLS on port 25, with a DANE record for mail.internet1.cz.
- TLS on all client ports.
- rspamd filtering on inbound mail.
06
Reports and delisting
We answer reports within one working day. When a report is confirmed, we suspend the offending account.
Delisting and vetting enquiries are welcome at postmaster@internet1.cz, or call +420 702 377 358.