SPF/DKIM and sending emails from parent domain
ragebiswas asked: I’m trying to understand how apps such as greenhouse.io configure DNS for delegating email sending. In short, assume I am a SAAS provider saas.com and my customer is …
Replace VPS rDNS FQDN with a mail subdomain
Adam asked: I have a VPS with a single IP address and multiple domain names. I used mail-tester.com to check the spam rate of my email. And my results are: …
Null Client Mail Server
Chr asked: I want to set up a null client mail server, i.e. a mail server that sends e-mails, but does not receive e-mails. I tried multiple guides relying on …
Are SMTPS and IMAPS ports really deprecated?
knight_lightning asked: I’ve read that STARTTLS command was added and intended to deprecate the SSL ports. But even major mail servers like google still use SSL ports and even don’t …
Sendmail – retry instead of permanent failure on DNS errors
Hungrig asked: The last few days, our hosting provider has had occasional connectivity issues with one of their upstreams. Each time this happens, we end up with a heap of …
How to move domain to new host?
Artur Müller Romanov asked: I am very new to working with domains. Yesterday I set up a domain for my company. I used the service strato.de. Now I’ve read VERY …
Correctly setup email for WordPress
willowen100 asked: I have finally got WordPress setup and working on my VPS using WP-CLI. It wasn’t until I wanted to change my Administration Email Address found under Settings > …
Mail error 550 Maximum line length exceeded (RFC 5322 2.1.1)
Dennis asked: I have a reseller hosting account containing a couple of domains. One of our clients has recently been complaining about emails not being sent. They are receiving the …
Dovecot + Postfix can send but email will not show up in inbox
T. Zack Crawford asked: I am trying to set up an email server on my personal website server. I am mostly there, I can send email but sending emails to …
Gitlab – Postfix can't send mail to external domain
dvj asked: On an Ubuntu 18.04 Server (VM), I have a gitlab omnibus installation (12.10.6) configured with an LDAP login. Besides LDAP, I didn’t change the configuration defaults. At the …