- Qt 6.9
- Qt Network
- C++ Classes
- QDnsMailExchangeRecord
- Qt 6.9.1 Reference Documentation

# QDnsMailExchangeRecord Class

The QDnsMailExchangeRecord class stores information about a DNS MX record. More...

Header: | `#include <QDnsMailExchangeRecord>`
CMake: | `find_package(Qt6 REQUIRED COMPONENTS Network)` `target_link_libraries(mytarget PRIVATE Qt6::Network)`
qmake: | `QT += network`

- List of all members, including inherited members
- QDnsMailExchangeRecord is part of Network Programming API and Implicitly Shared Classes.

## Public Functions

| QDnsMailExchangeRecord()
| QDnsMailExchangeRecord(const QDnsMailExchangeRecord &other)
| ~QDnsMailExchangeRecord()
QString | exchange() const
QString | name() const
quint16 | preference() const
void | swap(QDnsMailExchangeRecord &other)
quint32 | timeToLive() const
QDnsMailExchangeRecord & | operator=(const QDnsMailExchangeRecord &other)

## Detailed Description

When performing a lookup on a service, zero or more records will be returned. Each record is represented by a QDnsMailExchangeRecord instance.

The meaning of the fields is defined in RFC 1035.

See also QDnsLookup.

## Member Function Documentation

### QDnsMailExchangeRecord::QDnsMailExchangeRecord()

Constructs an empty mail exchange record object.

### QDnsMailExchangeRecord::QDnsMailExchangeRecord(const QDnsMailExchangeRecord &other)

Constructs a copy of other.

### `[noexcept]` QDnsMailExchangeRecord::~QDnsMailExchangeRecord()

Destroys a mail exchange record.

### QString QDnsMailExchangeRecord::exchange() const

Returns the domain name of the mail exchange for this record.

### QString QDnsMailExchangeRecord::name() const

Returns the name for this record.

### quint16 QDnsMailExchangeRecord::preference() const

Returns the preference for this record.

### `[noexcept]` void QDnsMailExchangeRecord::swap(QDnsMailExchangeRecord &other)

Swaps this mail exchange record with other. This operation is very fast and never fails.

### quint32 QDnsMailExchangeRecord::timeToLive() const

Returns the duration in seconds for which this record is valid.

### QDnsMailExchangeRecord &QDnsMailExchangeRecord::operator=(const QDnsMailExchangeRecord &other)

Assigns the data of the other object to this record object, and returns a reference to it.