If the session was authenticated using OAuth credentials, it is limited to approximately the validity period of the access token used.Gmail IMAP sessions are limited to approximately 24 hours.Gmail POP sessions are limited to approximately 7 days.Use port 465, or port 587 if your client starts with clear text before issuing the STARTTLS command.The outgoing SMTP server,, requires TLS.Incoming connections to the IMAP server at :993 and to the POP server at :995 require SSL.

The SASL XOAUTH2 protocol documentation describes the SASL XOAUTH2 mechanism in great detail, and libraries and samples that have implemented the protocol are available.

The SASL XOAUTH2 mechanism allows clients to provide OAuth 2.0 credentials for authentication.

IMAP, POP, and SMTP use the standard Simple Authentication and Security (SASL) layer, through the native IMAP AUTHENTICATE, POP AUTH, and SMTP AUTH commands, to authenticate users.

Gmail's IMAP, POP, and SMTP servers have been extended to support authorization through the industry standard OAuth 2.0 protocol.

For non-Gmail clients, Gmail supports standard IMAP, POP, and SMTP protocols. Gmail IMAP sessions are limited to approximately 24 hours. Gmail POP sessions are limited to approximately 7 days.

Activate 'IMAP Access' and / or 'POP Download'.

Go to “Settings”, for example click on the “Gears” icon and select “Settings”.

How to enable IMAP / POP3 / SMTP servers for Gmail account

You can only send a total of 500 emails per day, which is probably more than enough for the average user. Just keep in mind that Gmail's SMTP settings have a send limit, which has been put in place to prevent spamming. They're located in a different location depending on the email client you're using, but they should be relatively easy to find. If you don't see them, you'll need to open your account settings and do some research. Then all you have to do is enter the information you see above. Next, Gmail's SMTP settings should appear on your screen. Once you've added your account to an email client of your choice, the first thing you'll likely need to do is enter your email address and password. SMTP username: Your Gmail address SMTP password: your Gmail password.Use the table below to update your client with the correct inbound and outbound smtp server information: Incoming mail server ( IMAP) These outgoing emails might be part of email marketing campaigns or transactional emails such as password reset emails, order confirmation emails, emails user registration, etc.

Configure gmail on mac