RimuHosting Blog

Tag: Email

  • Beyond Gmail: Taking back control of your own email address

    Write programs that do one thing and do it well. Write programs to work together. – Douglas McIlroy Still borrowing an email address? Are you running your business or personal brand from @gmail.com, @outlook.com, or even an address tied to your ISP? Imagine you’re a small business owner who relied on their ISP-provided email address…

  • SMTP, SPF, DKIM, DMARC, TLS

    Did you know anyone can send an email impersonating your email address? Back in 1971 when ’email’ was invented and later when it was connected to the Internet both email users knew each other. Since then spammers and other bad actors started to abuse this ‘feature’. And since then some new mechanisms have been added…

  • DKIM and subaddressing added to 25mail.st

    We have added a couple of features to the 25mail.st service. First, we now support DKIM email signing. This lets our email servers sign outgoing messages so that recipients can verify that the email was sent from an authorized server. You will need to add a DNS entry for each email domain wishing to have…

  • Migrating email between IMAP accounts

    Often when people switch servers, or move to new providers, transferring email can be problematic. If you are using POP3, the email is already on your personal computer, however if you are using IMAP then you are stuck trying to add a second account and drag and drop for each user, or similar. Never fear,there…

  • Finding spam sending PHP scripts on your server

    Everyone has the occasional user who may leave something on their server that may send spam, or not update things as fast as they should. Tracking down the spammer can be a real problem though. Sometimes you can track down the domain, but not the script, other times they may have so many files that…

  • Setting up Domains Keys (DKIM) on Postfix

    This is a quick and fairly painless way of setting up DKIM, on a postfix server. DomainKeys Identified Mail (DKIM) is a method for associating a domain name to an email message, thereby allowing a person, role, or organization to claim some responsibility for the message and helps verify that your mail is legitimate. This…

  • Checking a potentially hacked machine and reinstalling packages when you break things

    Sometimes you may see something odd go past in the logs, on the screen, or something might just seem a bit ‘off’ somehow. Its a good idea when this happens to just double check that things are as they should be, verify packages, binaries, check logs etc Here are a few things i find helpful…

  • Why is your server sending spam? why does it keep crashing with high load?

    We get asked these questions regularly, and 9 out of 10 times it may be because your server may have been hacked, either on a user level, web application, or more. Here are some ways to quickly check for the most common things we see , and some of the processes we go through to…

  • PCI compliance – a basic HOWTO

    A lot of people are wanting to be PCI compliant these days, and this is generally a good thing. PCI compliance is not just a server spec, but a list of procedures, policies, controls over access to data. Therefore the server side is only one part of the process. It can be expensive and time…

  • Previewing 25mail.st: managed email hosting service

    Mail server issues are one of the most frequent mail server requests we get here at RimuHosting.  Troubleshooting existing configurations.  Setting up ‘basic’ mail servers for customers.  Setting up fancy ‘do everything’ mail servers for customers.  Answering queries about why ‘x’ is flagged as SPAM (or not).  Advising on things like SPF and DKIM.  Blacklists…