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MailMum Whitepaper

Forward MailMum offers individual services for email administrators to monitor incoming mail traffic and to control it by blocking IP addresses or even IP networks of abusive systems using Real-time Blackhole List (RBL) technology. The admin has full control over the listings by defining parameters, blacklisted (abusive), and whitelisted (trusted) IP addresses. The defined rules may apply for the whole account down to an individual server. Mail System Today Provided by several sources email traffic is up to 90% or unwanted emails (called spam or junk).

Certbot: renewing all Let's Encrypt certificates

Certificates today are like DNS - they must work, because most of the systems expect them to be there and they must be valid. Especially Google changed for many services to contact with SSL/TLS enabled by default. Renewing outdated certificates Sometimes problems arise and you need to check whether certbot (of Let’s Encrypt) or cron is still working. Maybe you simply want to check, whether your certificates are all renewed, you can simply run:

MailMum Project Started

A name, domain, logo, and a draft website - this is the way MailMum was born out of an internal project. From a necessity to this service MailMum was born out of a need to face problems with unwanted emails called spam or junk. As filters like Spamassassin were good, but spammers are human and their job is to figure out, how to bypass them. They will try and will find ways to reach your inbox.