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  • Timeout
  • Gmail: What to do if a connection to Gmail (SMTP, IMAP, POP3) fails with a certificate error?
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Stored procedures
Starts a session for receiving and reading emails with the IMAP protocol. You will only be able to read the emails. You have the ability to start a secure IMAP session via SSL.
Remark: To start a session for sending emails, use EmailStartSMTPSession.
// Read an email via the IMAP protocol
IF EmailStartIMAPSession(EDT_USER, EDT_PASSWORD, "imap.mydomain.fr") = True THEN
Error("Unable to establish the connection")
<Result> = EmailStartIMAPSession(<Username> , <Password> , <Server address> [, <Port> [, <Option>]])
<Result>: Boolean
  • True if the session was started,
  • False otherwise. To find out the error details, use ErrorInfo.
<Username>: Character string (with quotes)
User name on the server. This name is supplied by the service provider or by the network administrator. This name will be used to identify the email session in the different functions for email management.
<Password>: Character string (with quotes)
User password. This password is given by the service provider or by the network administrator.
<Server address>: Character string (with quotes)
Address of email server (incoming protocol). This address is supplied by the service provider or by the network administrator. This address can be given in the following format:
  • IP address in XXX.XXX.XXX.XXX format ( for example).
  • IP address containing the server name (imap.mydomain.fr for example). This syntax is recommended.
  • IP address returned by NetIPAddress.
Remark: The address must be a IPv4 address.
<Port>: Optional integer
Identifies the port used for the IMAP protocol (143 by default).
<Option>: Optional Integer constant
Used to specify whether an SSL connection is required:
(Default value)
Non-secure connection.
optionSSLSSL connection required (for a secured IMAP server).
Remark: In most cases, the port used for a secured IMAP server is port 993 (instead of port 143, the default port value).


The timeout can be set using EmailSetTimeOut.

Gmail: What to do if a connection to Gmail (SMTP, IMAP, POP3) fails with a certificate error?

Since August 2017, a new certificate was deployed by Google: Google Internet Authority G3. Unfortunately, the Windows API for checking certificates does not validate this certificate.
Therefore, starting a POP3, IMAP or SMTP session may fail with the error "The certificate string was not issued by a trusted authority".
To validate the certificate, all you have to do is modify the management mode of emails. The WLanguage EmailConfigure function allows you to change this mode and to no longer use the Windows API that locks this certificate. The following code must be added before starting the session via EmailStartIMAPSession:
// Enable the multi-platform implementation
EmailConfigure(emailParameterMode, 1)
Remark: From version 23 Update 1, the call to EmailConfigure is not required anymore: WLanguage is automatically using the management mode of emails adapted to the session.
Component: wd260com.dll
Minimum version required
  • Version 15
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