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Sending with the Enhanced MTA

The Adobe Campaign Enhanced MTA (Mail Transfer Agent) provides an upgraded sending infrastructure allowing for improved deliverability, reputation, throughput, reporting, bounce handling, IP ramp up and connection setting management.

It is implemented to improve scalability, increase delivery throughput and help send more emails faster. This is achieved with new adaptive delivery techniques that alter email sending settings in real-time based on feedback from Internet Service Providers.

If you were provisioned a Campaign Classic instance after September 2018, you are using the Enhanced MTA. For all other Campaign Classic customers, see the Frequently asked questions below.

The Enhanced MTA implementation may impact some of the existing Campaign functionality. For more on this, see the Enhanced MTA specificities.

Frequently asked questions

Usage and benefits

What is the Enhanced MTA?

Adobe Campaign can now be upgraded to use a new MTA (Mail Transfer Agent) which runs SparkPost’s commercial email MTA called Momentum.

Momentum represents innovative, high-performance MTA technology which includes smarter bounce handling and an automated deliverability optimization capability that helps senders achieve and maintain optimal inbox delivery rates.

What are the benefits?

• Adobe Campaign clients using the Enhanced MTA have seen a massive increase in overall throughput speed, and a significant reduction in soft bounces.
• The Enhanced MTA uses the latest MTA technology to provide you with the optimal throughput speeds for your email delivery.
• By adapting instantly and automatically to the feedback it receives, it also ensures more accurate and intelligent email delivery with real-time delivery data.

Can I use the native Adobe Campaign MTA and the Enhanced MTA at the same time?

No. Only the Enhanced MTA can be used for your email deliveries after your instance has been upgraded.

Upgrading to the enhanced MTA

What is required to upgrade to the Enhanced MTA?

If you were provisioned a Campaign Classic instance after September 2018, no action is required as you are already using the Enhanced MTA.

For all other hosted or partially hosted (hybrid) customers, the Adobe Campaign team will reach out to coordinate a date for migration and will provide details on the appropriate steps needed to migrate.

What is the process to upgrade my instance to the Enhanced MTA?

The entire process for your hosted instances requires a few minutes of downtime. Adobe will monitor the email throughput and deliverability for up to 24 hours post-upgrade to assess any impact to your email deliveries.

In case any issues are discovered, Adobe can quickly and temporarily revert your instance back to the native Adobe Campaign MTA.

Currently, the Enhanced MTA only affects the email channel. Your push notifications and SMS deliveries will continue to use the native Campaign MTA and will not be affected in any way by the upgrade.

Do I need to go through IP warming again after upgrading to the Enhanced MTA?

No. Upgrading does not require switching to new IPs, so you can continue using your existing, warmed email IPs.

Will upgrading to the Enhanced MTA impact any campaigns or deliveries currently in progress?

Any deliveries that were prepared before your instance was upgraded to use the Enhanced MTA will need to be re-prepared in order to properly use the new MTA.

For customers using Adobe Campaign transactional messaging functionality, any API calls to trigger an email will be queued during the very short upgrade downtime and will be attempted upon completion of the upgrade.

Enhanced MTA specificities

Enhanced MTA headers

The latest Campaign Classic instances include code that adds the required Enhanced MTA headers to every message. If you are using Adobe Campaign 19.1 (build 9032) or above and if this is not the case, you must request Adobe Customer Care to add the “useMomentum=true” parameter to your execution instance configuration (in the serverConf.xml file), which may be your marketing instance, mid-sourcing instance, or transactional messaging execution instance, depending on your configuration.

However, if you are using an older instance that does not include this code, a new typology rule named Typology Rule for Enhanced MTAs must be added to all the existing typologies in your Campaign instance.
This rule is added by a Typology package installed as part of the upgrade to the Enhanced MTA.

This Typology package needs to be installed on the Adobe Campaign marketing instance.

If you are a hybrid client, the Adobe Campaign team will provide you with instructions on how to install the Typology package on your marketing instance as part of the upgrade to the Enhanced MTA. Contact your account executive to get the full instructions.

For more on typologies, see this section.

New MX rules

The MX management delivery throughput rules are no longer used. The Enhanced MTA has its own MX rules that allow it to customize your throughput by domain based on your own historical email reputation, and on the real-time feedback coming from the domains where you’re sending emails.

For more on MX configuration, see this section.

Bounce qualification

The bounce qualifications in the Campaign Delivery log qualification table are no longer used for synchronous delivery failure error messages. The Enhanced MTA determines the bounce type and qualification, and sends back that information to Campaign.

For more on bounce qualification, see this section.

Delivery throughput

The Campaign Delivery throughput graph will no longer display the throughput to your email recipients. That graph will now show the throughput speed for the relay of your messages from Campaign over to the Enhanced MTA.

For more on the delivery throughput, see this section.

Retries

The retry settings in the delivery are no longer used by Campaign. Soft bounce retries and the length of time between them are determined by the Enhanced MTA based on the type and severity of the bounce responses coming back from the message’s email domain.

For more on retries, see this section.

Validity period

The validity period setting in your Campaign deliveries will be used by the Enhanced MTA only if set to 3.5 days or less. If you define a value higher than 3.5 days in Campaign, it will not be taken into account.

For example, if the validity period is set to the default value of 5 days in Campaign, soft-bouncing messages will go into the Enhanced MTA retry queue and be retried for only up to 3.5 days from when that message reached the Enhanced MTA. In that case, the value set in Campaign will not be used.

Once a message has been in the Enhanced MTA queue for 3.5 days and has failed to deliver, it will time out and its status will be updated from Sent to Failed in the delivery logs.

For more on the validity period, see this section.

DKIM-signing

DKIM (DomainKeys Identified Mail) email authentication signing is done by the Enhanced MTA. DKIM-signing by the native Campaign MTA will be turned off within the Domain management table as part of the Enhanced MTA upgrade.
For more on DKIM, see the Adobe Deliverability Best Practice Guide.

Delivery success reporting

In the Summary view of an email delivery dashboard, the Success percentage starts out at 100% and then progressively goes down throughout the delivery validity period, as the soft and hard bounces get reported back from the Enhanced MTA to Campaign.

Indeed, all messages show as Sent in the sending logs as soon as they are successfully relayed from Campaign to the Enhanced MTA. They remain in that status unless or until a bounce for that message is communicated back from the Enhanced MTA to Campaign.

When hard-bouncing messages get reported back from the Enhanced MTA, their status changes from Sent to Failed and the Success percentage is decreased accordingly.

When soft-bouncing messages get reported back from the Enhanced MTA, they still show as Sent and the Success percentage is not yet updated. Soft-bouncing messages are then retried throughout the delivery validity period:

• If a retry is successful before the end of the validity period, the message status remains as Sent and the Success percentage remains unchanged.

• Otherwise, the status changes to Failed and the Success percentage is decreased accordingly.

Consequently, you should wait until the end of the validity period to see the final Success percentage, and the final number of actually Sent and Failed messages.

Email Feedback Service (beta)

With the Email Feedback Service (EFS) capability, the status of each email is accurately reported, because feedback is captured directly from the Enhanced MTA (Message Transfer Agent).

Once the delivery has started, there is no change in the Success percentage when the message is successfully relayed from Campaign to the Enhanced MTA.

The delivery logs show the Taken into account by the service provider status for each targeted address.

When the message is actually delivered to the targeted profiles and once this information is reported back in real time from the Enhanced MTA, the delivery logs show the Sent status for each address that successfully received the message. The Success percentage is increased accordingly with each successful delivery.

When hard-bouncing messages get reported back from the Enhanced MTA, their log status changes from Taken into account by the service provider to Failed.

When soft-bouncing messages get reported back from the Enhanced MTA, their log status remains unchanged (Taken into account by the service provider): only the error reason is updated. The Success percentage remains unchanged. Soft-bouncing messages are then retried throughout the delivery validity period:

• If a retry is successful before the end of the validity period, the message status changes to Sent and the Success percentage is increased accordingly.

• Otherwise, the status changes to Failed. The Success percentage remains unchanged.

The tables below show the changes in KPIs and sending logs statuses introduced by the EFS capability.

With Email Feedback Service

Without Email Feedback Service

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