Posteo Email Settings: POP3, IMAP, and SMTP Servers

Posteo is considered one of the most secure email providers globally as it employs industry-standard encryption, is packed with useful features, and is reasonably priced. The dependability and security of Posteo make it worthwhile to get to know the Posteo email settings for using this mail provider with your email client.

Posteo SMTP Settings

The mail client will not be able to send messages on your behalf without the SMTP settings. Therefore, keep the following Posteo SMTP settings in mind:

Option Description
SMTP Host:
SMTP Port: 465 - TLS/SSL, 587 - STARTTLS
SMTP Username: Your full email address (
SMTP Password: Your email account password

Posteo Settings For Receiving Emails

Unlike POP, where mail can only be accessible from a single device at a time, IMAP allows messages to get accessed from numerous devices.

Below are the Posteo POP and IMAP settings, respectively:

Posteo Email POP Settings

Option Description
POP3 Host:
POP3 Port: 995
Requires SSL: Yes TLS/SSL
POP3 Username: Your full email address (
POP3 Password: Your email account password

Posteo IMAP Settings

Option Description
IMAP Host:
IMAP Port: 993
Requires SSL: Yes TLS/SSL
IMAP Username: Your full email address (
IMAP Password: Your email account password

Useful Information to Remember

When working with Posteo, take note of the following:

💡 Note: Configuring Posteo in a mail client, whether on a PC, smartphone, or tablet, is client-specific. Follow these instructions to get your email client's most relevant configuration data.

Looking for Gandi settings or SFR Mail settings? Our Blog's Email Settings category contains specs for all major mail service providers.

POP vs. IMAP Email Servers: How To Choose

Choosing an email protocol is a step in establishing a mail client. In this regard, IMAP and POP are two of the most widely used mail protocols. Both manage emails and folders in email clients. Even though they both serve the same objective, some notable distinctions make one better than the other, depending on the use case.

Internet Message Access Protocol, or simply IMAP, enables email access from various devices. This option stores email data on a server rather than on the user's PC. When a device connects to a mailbox, the server retrieves the device's most recent information.

After that, the device downloads it and allows you to engage with the emails. If you modify a message, whether by deleting it or sending a new one, you will upload the modified message to the server. Emails essentially get synchronized between devices.

On the other hand, Post Office Protocol, or POP, was designed for dial-up connections. The mail gets saved on your computer rather than the server. This feature allows you to read and respond to messages even when not connected to the internet. However, this capability rarely gets required with today's always-on internet connections.

As a rule, IMAP is the preferred option for receiving emails while using many computers or mobile devices at once. Alternately, POP is the option for those who want all of their emails to remain available even if they are not connected to the internet and have a dedicated device for email.

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