For those unlucky enough to choose an email host that doesn't have built-in spam detection, it can often be an ordeal to route email correctly through a third-party filtering service. Some businesses actually prefer engaging with a third-party spam filterer, mostly for compliance or customization reasons. But, for the majority of SMBs, this is headache they would be best off trying to avoid.
MessageGears is a hybrid email marketing system that combines the security of an on-premises system with the scalability of the cloud. The service connects directly to any local or remote database, data warehouse, e-commerce system, or content management system. There is no need to extract, transform, or load customer data into the system or to move or replicate data. Features include subject line previews and testing, spam testing, and automation, drip and trigger campaigns.
Segmentation tools: The most successful and professional email marketing campaigns make your customers feel important. To do this, you need to send only applicable content to each subscriber. With segmentation tools, you can separate your contacts into specific groups to ensure they only receive content that's relevant to them. Creating smaller email lists within your one large email list helps you target groups more effectively. Segmentation is an important email marketing tool.
Obviously, it takes more work to create and place guest posts, but it’s worth it if the publication is aligned and authoritative. We found a way to create additional value with this as well by working with internal HubSpot experts who wanted to get their thoughts out on a given subject. For example, here’s a guest post that Blake Toder wrote for the Usabilla blog:
Elastic Email provides comprehensive tools for handling any size of email campaign. With Elastic Email, businesses can create and edit emails using predesigned templates, drag-and-drop editors and raw HTML editors. Features of the service include email client and spam testing, A/B split testing, contact management tools, segmentation, triggered emails, detailed activity reports, private IP addresses, and custom branding. 

The 10DollarSoloAds Service is a sophisticated targeted ad system that shows your ad to thousands of fresh opt-in leads. Just enter your ad (Don’t have an ad? We will write one for you) and click the send button and your ad will be shown to thousands of fresh prospects. Each ad is a “solo ad” and contains only your advertisement. If you have ever tried to sell something online then you have probably experienced the frustration of getting people to your website. Look no further, 10DollarSoloAds.com specializes in the best type of highly responsive targeted solo ad campaigns that will get people to your website. We sell solo ads that work. Each ad campaign we send contains only your ad.
Examples of this include things such as instant messaging (IM) and team chat tools, video conferencing software, online meeting collaboration tools, shared team intranet sites, and more. Some even integrate with third-party tools such as Slack, a highly popular collaboration tool that combines customizable chat "channels" with file sharing and project management. For those who want to integrate with certain apps more deeply or integrate with custom-developed apps they have built in-house, many bigger-name email services will provide robust application programming interfaces (APIs) that will let your in-house developers or consultants deliver on those needs. They will need to be involved in the email service selection process, however, as this is an important consideration during your evaluation period.
CleverReach is an email marketing tool that uses a drag and drop newsletter editor to help users design emails. The company also provides data on how the email marketing campaigns are doing in addition to the ability to design the campaigns. CleverReach offers a free option, which can send up to 10,000 emails a month to 2,500 recipients for businesses with small email subscriber lists, or those looking to try out the product.
WhatCounts, which recently joined forces with Windsor Circle, offers email marketing software can be operated from the cloud or on your own servers. Features include a life cycle workflow builder, behavioral personalization, advanced segmentation, dynamic content, a relational database, responsive templates, campaign analytics, A/B testing and social sharing.
The most flexible email marketing services offer per-email or pay-as-you-go pricing. While pricing based on your number of contacts is ideal for businesses that regularly send emails, per-email pricing is better for companies that only occasionally send them. Some providers allow you to consult with their email marketing experts for help designing templates and setting strategies for an additional cost. 
MessageGears is a hybrid email marketing system that combines the security of an on-premises system with the scalability of the cloud. The service connects directly to any local or remote database, data warehouse, e-commerce system, or content management system. There is no need to extract, transform, or load customer data into the system or to move or replicate data. Features include subject line previews and testing, spam testing, and automation, drip and trigger campaigns.

Getting started shouldn't be daunting. Generally, you'll know right away whether you like a user interface (UI) or not, and most of the contenders we reviewed offer free trials so you can poke around before dropping any cash. Luckily, most of these services have modern-looking graphics and uncluttered layouts. These are not the complex business software UIs of yesterday. Be careful, though, as some free trials require a credit card. This means you need to be sure to cancel your trial before you're billed if you're not happy with the service.
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