The generic Email Client Configuration for residential email services (@pt.lu) applies for most common email client software.
However, some email clients are requiring a specific configuration, which is explained in dedicated notes.

Generic Email Configuration

Email configuration must be done :

1. to read messages from your mailbox – there are 2 protocols:
   • IMAP (preferred over POP3)
   • POP3 (obsolete – only to be used for some rare useful cases)
2. to send messages into the internet – SMTP is the protocol to be configured

IMAP Configuration

Parameter	Value	Comment
incoming server name	imap.pt.lu	hostname used to read messages
protocol	IMAP	preferred over POP (see above)
port	993	993 is mandatory (encrypted)
encryption	SSL/TLS	encryption is mandatory

POP3 Configuration

Parameter	Value	Comment
incoming server name	pop.pt.lu	hostname used to read messages
protocol	POP3	obsolete (see above)
port	995	995 is mandatory (encrypted)
encryption	SSL/TLS	encryption is mandatory

SMTP Configuration

Parameter	Value	Comment
outgoing server name	smtp.pt.lu	hostname used to send messages into the internet
protocol	SMTP	SMTP AUTH (SMTP submission)
port	587	587 is mandatory (SMTP submission)
encryption	STARTTLS	encryption is mandatory