Introduced the SMTPAuthNoAuth mechanism in the auth.go file meant for instances where authentication is not required or supported. Adjusted tests in client_test.go to account for this new mechanism. Minor order modifications were also made to the list of supported SMTP AUTH types and respective tests for better consistency.
Closes#176
The Go version has been updated to '1.22' in the 'sonarqube.yml', 'golangci-lint.yml', and 'codecov.yml' GitHub action workflow files. This includes an additional modification for the Go versions matrix and condition statements in the 'codecov.yml' workflow.
The Go version has been updated to 1.22 in the .golangci.toml file for compatibility reasons. Additionally, unnecessary white space has been removed from the smtp/smtp_test.go file to maximize code efficiency and readability.
A new "X-Auto-Response-Suppress" header has been added. The SetBulk method has been updated to include this new header, as it is recommended for automated emails. This functionality is tested in the msg_test.go file.
The code has been updated to allow for an HTML alternative to the plain text body in messages. This includes adding a new function to add this alternative body along with additional unit tests to ensure the multipart messages are properly constructed. The tests also check the correct usage of different charsets.
New unit tests have been introduced for WithPartCharset and SetCharset methods in part_test.go. Also, a GetCharset method has been implemented in part.go. These modifications ensure the robustness of charset handling within the application.
Charset support has been added in the 'Part' struct. A 'SetCharset' method and a 'WithPartCharset' option have been added to override the default Part charset. The 'writePart' function in msgWriter now accommodates the charset defined at the Part level, defaulting to the previous functionality if not set.
Test cases have been added for numerous client functionalities including WithTLSPortPolicy option for the NewClient method, Client.SetSSLPort method, and the Client.DialWithContext method with the fallback port functionality. Minor code simplification has also been performed in the 'SetSSLPort' function in client.go file.
Enhanced the unit tests in client_test.go by adding more test cases for SSL Port and TLS Port Policy. These additions contribute to more effective coverage of edge cases and increase the robustness of the test suite.
The codecov-action version used in the GitHub workflow file has been upgraded from v2 to v3. This enhances the reliability and performance by leveraging the new features and improvements available in version 3. This commit doesn't affect the functionality of the project but is more of a dependency update.
Introduced default ports for SSL/TLS and STARTTLS connections in SMTP client. Also added fallback behavior, allowing the client to attempt connections on port 25 using plaintext if secured connections fail. Deprecated old methods and implemented new ones to enforce these changes effectively.
This is a copy of the PR muhlemmer:enhance-default-tls-port by @muhlemmer. Since they unfortunately didn't reply in the PR anymore I cloned the PR. They will be fully attributed in the PR, though.
The FreeBSD version used for testing in .cirrus.yml has been updated from 12.4 to 14.0. This change ensures that the tests run on the latest stable version of the operating system, providing more reliable and up-to-date test results.
This commit adds checks in the testing functions to verify the successful implementation of message delivery status. A new attribute `isDelivered` is now being validated in our tests, reinforcing the message tracking system and enhancing the overall reliability of our application.
This update introduces a new property, `isDelivered`, in the message struct to track if a message has been successfully sent or not. Additionally, this also includes a new helper function `IsDelivered` to easily retrieve the status. This feature enhances the tracking capabilities of outgoing messages across different client files.
Implemented a null check to ensure the 'fi' file handle is not empty. With the absence of this check, the test was continuing even when 'fi' was empty, leading to null pointer exceptions further down in the code.
Added robustness and improved error handling in msg_test.go by adding null checks before calling values from the genHeader map in RequestMDNTo and related functions. This enhancement was necessary to avoid the operations on non-existing keys and potential null pointer exceptions.
Added additional checks when calling values from the genHeader map in msg.go file. This is to prevent trying to operate on non-existing keys, hence avoiding possible null pointer exceptions. The checks ensure the key HeaderMessageID exists in the genHeader map before attempting to operate on it. This is essential for functions like RequestMDNTo, RequestMDNToFormat, and RequestMDNAddToFormat, thereby improving the robustness of the code.
Added checks to ensure the key HeaderMessageID exists in the genHeader map before attempting to operate on it in msg.go. This will prevent possible null pointer exceptions when trying to assign the key a value or append it to the mids slice.
This commit adds conditions in msg.go file to check if the header 'HeaderDispositionNotificationTo' key exists in the map 'm.genHeader' before trying to associate it with a value. This prevents potential null pointer exceptions.
Added condition checks in `msg_test.go` for nil or empty Subject headers in the assigned functions. If the Subject is found to be nil or its length is less than 1, an empty string is now appended to prevent issues arising from null pointers or non-existent Subject headers in email messages.
Updated the Is function in senderror.go to handle null values for SendError. This was done by adding a nil-check for surfaced pointer errors in the errors.As call. This prevents the function from attempting to derive values from a null pointer and consequently prevents null pointer exceptions from being thrown.
Updated the Reader struct in reader.go to properly handle nil buffers. This prevents potential errors from nil pointer dereference. Also added the fmt package for debugging purposes. Correspondingly, additional tests in reader_test.go were also added to cover these edge cases and ensure the Reader struct correctly handles them.
Extended null check conditions in msgwriter.go to prevent potential nil pointer dereference. This change ensures robustness in error handling in scenarios where FROM header or envelope FROM is either not existent or nil.
Added an additional condition in the SendErrorIsTemp function within msg.go to ensure that the error e is not nil before referencing it. This guards against potential runtime panics from dereferencing a nil pointer, enhancing robustness of error handling.
Introduced a new condition that checks and returns an error if either STDERR or STDIN pipe is nil in the msg function of msg.go. This improves error handling by preventing potential panic due to referencing a nil pipe.
Converted the range loop in the GetAddrHeaderString function in msg.go to use value semantics rather than index notation. This improves code clarity by not unnecessarily referring to m.addrHeader[h] in the loop and instead referencing the value directly (using variable mh), making it easier to understand and maintain.
A change was made in the SMTP client creation process to add more robust error handling. The new logic checks if the client is null after being created and, if true, returns an error. This update can help prevent potential null pointer exceptions in runtime, ultimately leading to more stable application.
Added a nil check in the IsTemp method in senderror.go to prevent runtime errors when method is called on a nil object. The method now immediately returns false if it is invoked on a nil *SendError, ensuring the program's robustness against potential misuse. This increases the robustness and readability of the
Added a condition to prevent assignment of an empty address list to the 'HeaderFrom' scenario. This eliminates potential runtime errors when trying to access an nonexistent element of a slice.
Adjusted error handling in the sendmail execution part by reusing the 'err' variable, promoting cleaner, more readable code.
Tests for new mail address handling methods have been updated to use {Name:"", Address: "email@example.com"} format for initializing the []*mail.Address slices, instead of the previous shorthand {"", "email@example.com"}. This was done to increase code clarity and explicitness.
