Postfix routinely references both smtp and smtpd in configuration files. What is the difference?
115958
What's the difference between postfix/smtp and postfix/smtpd
49681
What is the difference between /var/mail/XXX and /var/spool/mail/XXX
15941
What is the difference between POST and PUT in HTTP?
20786
How do I need to configure SMTP Auth?
30345
Why are there two Address lines in Address forms?
131699
Specify a sender when sending mail with Python (smtplib)
155494
Configure postfix to send and receive to and from localhost
23746
Virtual Domains with Postfix and SSL
69576
Why is SPF being validated against my mail server's IP instead of sender's IP?
44277
How to validate smtp credentials before sending mail?
28941
What is the format for e-mail headers that display a name rather than the e-mail?
24487
What's the difference between "Service" and "/etc/init.d/"?
24490
postfix fails to send mail with "fatal: unknown service: smtp/tcp"
153724
DKIM sign outgoing mail from any domain (with Postfix and Ubuntu)
90243
Upgrading to Debian 7: Postfix Auth fails
28922
Setting multiple SMTP settings in web.config?
114231
What is the relationship between MIME types and File .extensions?