Mail Ports for POP3, IMAP and SMTP - Knowledgebase (2024)

FAQs

Mail Ports for POP3, IMAP and SMTP - Knowledgebase? ›

If you enable the POP service, you can specify the port number that the server is to use for POP connections. The default is 110. If you enable the IMAP service, you can specify the port number that the server is to use for IMAP connections. The default is 143.

If you enable the POP service, you can specify the port number that the server is to use for POP connections. The default is 110. If you enable the IMAP service, you can specify the port number that the server is to use for IMAP connections. The default is 143.

Incoming connections to the IMAP server at imap.gmail.com:993 and the POP server at pop.gmail.com:995 require SSL. The outgoing SMTP server, smtp.gmail.com , supports TLS. If your client begins with plain text, before issuing the STARTTLS command, use port 465 (for SSL), or port 587 (for TLS).

What are the standard SMTP ports? There are four of them that are or were considered standard at some point. These port numbers are 25, 465, 587, and 2525. Other ports can also be used for SMTP transmission, but they're not usually the first choice for Internet Service Providers (ISPs).

In Outlook, click File. Then navigate to Account Settings > Account Settings. On the Email tab, double-click on the account you want to connect to HubSpot. Below Server Information, you can find your incoming mail server (IMAP) and outgoing mail server (SMTP) names.

POP3 works on the following two ports by default: port 110: default, non-encrypted port; and. port 995: should be used when the user needs to connect using POP3 securely.

Find the email address you want to check the ports of and click the “Connect Devices” button. Under the Mail Client Manual Settings section, you'll find which ports the email address is using. In this example, I am using a secured server, so my ports are 993 for IMAP and 995 for POP3 as the incoming mail connection.

Originally, the Simple Mail Transfer Protocol (SMTP) used port 25. Today, SMTP should instead use port 587 — this is the port for encrypted email transmissions using SMTP Secure (SMTPS). Port 465 is also used sometimes for SMTPS. However, this is an outdated implementation and port 587 should be used if possible.

Should I email port 465 or 587? ›

Port 587 is technically correct, the best kind of correct. However, many ESPs have adopted implicit TLS on port 465. While you can send email over port 25 and 2525, it's much more secure to have the messages encrypted. This makes port 587 the preferred option for sending, with port 465 as a close second.

port 25 should only be used for relaying (i.e., mail server to mail server communications), and. port 465 should no longer be used at all.

The common protocols for email delivery are Post Office Protocol (POP), Internet Message Access Protocol (IMAP), and Simple Mail Transfer Protocol (SMTP).

Port 587 is often used to encrypt SMTP messages using STARTTLS, which allows the email client to establish secure connections by requesting that the mail server upgrade the connection through TLS. Port 465 is used for implicit TLS and can be used to facilitate secure communications for mail services.

Go to Settings and then Passwords & accounts. Tap the mail account you want to change the settings for. Update the Host Name for Incoming Mail Server. Tap SMTP to update the settings for the Outgoing Mail Server.

Type the name and port of the incoming mail server into your email software. The IMAP server is imap.gmail.com and the port is 993. The POP server is pop.gmail.com and the port is 995. The username and password for your mail settings is the same as what you use to log into Gmail.

When you need to add your Outlook.com account (or Microsoft account / Hotmail account / Live.com account / MSN account) to another mail app (like Gmail), you'll need to use the following SMTP settings: SMTP Server Name: smtp.office365.com. SMTP Port Number: 587. SMTP Encryption Method: STARTTLS.

Outlook enables IMAP access by default, so all you need to do is use these settings: Server: outlook.office365.com. Port: 993.

In Outlook Web App, on the toolbar, select Settings. > Mail > POP and IMAP. The POP3, IMAP4, and SMTP server name and other settings you may need to enter are listed on the POP and IMAP settings page.

What is port 443 used for? ›

Port 443 is a virtual port that computers use to divert network traffic. Billions of people across the globe use it every single day. Any web search you make, your computer connects with a server that hosts that information and fetches it for you. This connection is made via a port – either HTTPS or HTTP port.

Summary of the SMTP, IMAP, and POP3 Email Protocols

An SMTP relay service can help you send email without having to build your own SMTP server. IMAP is one of the most common protocols for receiving email. IMAP syncs messages across all devices. POP3 is another protocol for receiving email on a single device.

Gmail provides IMAP access to your Gmail account, so you can connect to your email from mobile devices and desktop email clients.

Double click on the email account which you would like to check (if you only have one, then only one will be listed) Then, check the port numbers listed: 995 and 110 are POP3 ports. All other port numbers are IMAP. If there is no port number listed and you can see the Server URL then it is an Exchange account.

IMAP ports

Port 993 is the secure port for IMAP and it works over TLS/SSL encryption.

In terms of security, both port 465 and 587 are considered secure because they run over TLS encryption, meaning no third party could intercept any data sent back and forth.

Imap on port 143 is the newer of the two popular protocols used to retrieve eMail from remote mail servers. (The older protocol, pop3, the Post Office Protocol, uses port 110.)

If you're configuring your WordPress site or email client to send emails via SMTP (submission), you'll almost always want to use port 587. Again, this is the default SMTP port for submission and it supports secure transmission via TLS. If port 587 is blocked for some reason, port 2525 is a common alternative.

Today, most modern email services, including email service providers and hosting providers, default to using SMTP port 587.

The ports typically used for POP are TCP ports 110 and 995, and for IMAP are TCP ports 143 and 993, for insecure and secure sessions respectively.

Does port 25 need to be open to send email? ›

As long as your firewall rules permit outbound traffic you do not need to open port 25 to send an email. Port 25 only needs to be open if you wish your machine to receive email.

By default, all mail servers use port 25 when trying to relay messages to other servers. By blocking this port, your server cannot connect to these other servers and deliver messages to remote locations. If this block is in place, you will only be able to receive mail and send mail internally.

To configure your device or application, connect directly to Office 365 using the SMTP client submission endpoint smtp.office365.com.

Server Settings

Here are the Office 365 SMTP settings for your business account: Incoming server setting: outlook.office365.com. Outgoing SMTP server setting: smtp.office365.co. Incoming port (IMAP): 993.

The Simple Mail Transfer Protocol (SMTP) is an Internet standard communication protocol for electronic mail transmission. Mail servers and other message transfer agents use SMTP to send and receive mail messages.

An SMTP server is an application or computer that sends, receives and relays email. These servers typically use TCP on port 25 or 587.

SMTP. The Simple Mail Transfer Protocol (SMTP) is used for sending and receiving e-mail between e-mail clients and servers.

The TLS/SSL port is 443, HTTPS, and employs TLS/SSL certificates to safeguard port communications. HTTP is the unsecure protocol port (port 80).

msa (port 587) Ports 465 and 587 are intended for email client to email server communication - sending out email using SMTP protocol. SSL encryption is started automatically before any SMTP level communication. It is almost like standard SMTP port.

How do I know if my SMTP port is open? ›

This method uses port 995 for POP3-over-SSL and port 465 for SMTP-over-SSL and for those using IMAP it uses port 993 for IMAP-over-SSL communication. or they can be self generated. Once the certificates are in place the email passed through the ports are encrypted and validated end to end using the key.

The Internet Message Access Protocol is an application layer Internet protocol that allows an e-mail client to access email on a remote mail server. The current version is defined by RFC 9051. An IMAP server typically listens on well-known port 143, while IMAP over SSL/TLS (IMAPS) uses 993.

By default IMAP works on two ports like POP3: 143 – this is the default port which does not provide any encryption. Port 993 is the secure port for IMAP and it works over TLS/SSL encryption.

POP3 ports

port 110: default, non-encrypted port; and. port 995: should be used when the user needs to connect using POP3 securely.

Originally, the Simple Mail Transfer Protocol (SMTP) used port 25. Today, SMTP should instead use port 587 — this is the port for encrypted email transmissions using SMTP Secure (SMTPS).

SMTP stands for Simple Mail Transfer Protocol. SMTP is the principal email protocol that is responsible for the transfer of emails between email clients and email servers.

SMTP (Simple Mail Transfer Protocol) is a TCP/IP protocol used in sending and receiving email. SMTP is used most commonly by email clients, including Gmail, Outlook, Apple Mail and Yahoo Mail. SMTP can send and receive email, but email clients typically use a program with SMTP for sending email.

Summary of the SMTP, IMAP, and POP3 Email Protocols

An SMTP relay service can help you send email without having to build your own SMTP server. IMAP is one of the most common protocols for receiving email. IMAP syncs messages across all devices. POP3 is another protocol for receiving email on a single device.

POP3 is still widely used today. However, an alternative protocol was created only a few years after the first version of POP. This one was called Internet Message Access Protocol (IMAP).

What port is 5555? ›

Port 7777/tcp can be used by: iChat server file transfer proxy or Oracle Cluster File System 2 or even games (Ultima Online, Active Worlds). Same for port 6666 - this one is often used for relay chat, but can indeed be used by a lot of malware too.