Transactional Email

Dedicated IP Address for Email Marketing/Transactional Email

By default, we use shared IP addresses to send emails. If you prefer, we can set up a dedicated IP on your account for Email marketing or Transactional Email. A dedicated IP allows you to control you…

SMTP Server

We offer a SMTP server for outgoing Transactional Email. Server: smtp.clicksend.com Port: 25 (Non-encrypted) or 465 (Secure SSL). If you're having issues, try 587 or 10001 (Non-encrypted). Username/P…

Emails going to spam?

There are a few reasons that your emails can end up in someones spam/junk folder. Here are a few things to check first: Test how spammy your emails are using this free tool: https://www.mail-tester.c…

Transactional Email: Attachment File Size

File Size. You can add attachments to your transactional emails with a file size up to 15MB max.

Formatting SMTP Emails

Our SMTP service does not maintain plain text formatting, it requires HTML formatted text in order to pass when sending from our system, such as the new line br tag. i.e <br> for new line.

550 Mailbox unavailable. The server response was: user is not verified for email marketing. The server rejected the sender address.

If you get this error, you haven't whitelisted your sending address. You need to whitelist the from email address here: https://dashboard.clicksend.com/#/transactional-email/settings/from-addresses

Transactional Email Webhooks

You can setup a URL for us to post status updates to here: https://dashboard.clicksend.com/#/transactional-email/settings/delivery-reports Possible statuses can be found in this article: Email Status…

Does transactional email support unsubscribes?

Our email marketing system automatically attaches an unsubscribe link to the bottom of each email. Our transactional email system doesn't. It's up to you to add an unsubscribe. If you aren't able to…

SMTP troubleshooting

Try to telnet to the server. Open up the commandline and run each of these commands. Let our support team know what the response is for each of them: telnet smtp.clicksend.com 25 telnet smtp.clicksen…