Here are some tips to troubleshoot most frequent issues with SMTP and email deliverability. Remember that using a professional SMTP service can help you solve most issues.

  • Check again your username and password.
  • SMTP normally uses port 25, but it may happen to be blocked by your ISP: try switch to port 587 (or port 465 if you’re connecting via SSL).
  • The SMTP settings are mistaken. Maybe you configured your mail client with a wrong outgoing server name.
  • Firewall or antivirus issues. Make sure that you have an exception rule for your SMTP service in your firewall, proxy service or antivirus settings.

If you keep running into issues, it’s likely that you have a general issue with your Internet Service Provider (which you should contact immediately).

We made up a list the most common email providers, in order to help you setup your SMTP configuration more easily. 

How to setup custom email addresses with SMTP

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