For non-Gmail clients, Gmail supports the standard IMAP, POP, and SMTP protocols. The Gmail IMAP, POP, and SMTP servers have been extended to support authorization via the industry-standard OAuth 2.0 protocol.
'Gmail funciona en todos los dispositivos Android, iOS y ordenadores. Ordena tus mensajes, colabora o llama a un amigo sin salir de tu bandeja de entrada'. On your computer, open Gmail. Check your emails as you normally would. If a message tells you a sender has requested a read receipt, choose an option: To send the receipt now, click Send receipts. To send the receipt later, click Not now. You'll be asked to send the receipt the next time you open the message. Sign in - Google Accounts. Gmail is an easy-to-use email app that saves you time and keeps your messages safe. Instantly receive your messages via push notifications, read and respond online and offline and find any message quickly. With the Gmail app, you get:. An organised inbox – Social and promotional messages are sorted into categories so you can read messages from friends and family first. 421, '4.7.0', TLS required for RCPT domain, closing connection. 421, '4.7.0', Try again later, closing connection. This usually indicates a Denial of Service (DoS) for the SMTP relay at the HELO stage. 450, '4.2.1' The user you are trying to contact is receiving mail too quickly. Please resend your message at a later time.
Protocol
IMAP, POP, and SMTP use the standard Simple Authentication and Security Layer (SASL), via the native IMAP
AUTHENTICATE
, POP AUTH
, and SMTP AUTH
commands, to authenticate users. The SASL XOAUTH2 mechanism enables clients to provide OAuth 2.0 credentials for authentication. The SASL XOAUTH2 protocol documentation describes the SASL XOAUTH2 mechanism in great detail, and libraries and samples which have implemented the protocol are available.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
, requires TLS. Use port 465
, or port 587
if your client begins with plain text before issuing the STARTTLS command.Session length limits
Gmail POP sessions are limited about to 7 days. Gmail IMAP sessions are limited to about 24 hours. If the session was authenticated using OAuth credentials, it's limited to about the validity period of the access token used (usually 1 hour). A session in this context is one continuous TCP connection.
When the time elapses and the session expires, Gmail closes the connection with a message saying that the session expired. After that, the client can reconnect, authenticate again, and continue. If using OAuth, make sure that the access token used is valid (if you try to use an access token older than 1 hour, it might be invalid).
Libraries and Samples
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Accessing mail using IMAP or POP and sending mail using SMTP is often done using existing IMAP and SMTP libraries for convenience. As long as these libraries support the Simple Authentication and Security Layer (SASL), they should be compatible with the SASL XOAUTH2 mechanism supported by Gmail.
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In addition to the SASL XOAUTH2 protocol documentation, you may also want to read Using OAuth 2.0 to Access Google APIs for further information on implementing an OAuth 2.0 client.
Mp3 audio recorder 2 10 0 2. The Libraries and Samples page provides code samples in a variety of popular languages using the SASL XOAUTH2 mechanism with either IMAP or SMTP.