> For the complete documentation index, see [llms.txt](https://help.murlist.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.murlist.com/email-warmup/common-errors/connection-errors.md).

# Connection errors

- [Google SMTP error](https://help.murlist.com/email-warmup/common-errors/connection-errors/gmail-smtp-errors.md)
- [Errors with port 25](https://help.murlist.com/email-warmup/common-errors/connection-errors/errors-with-port-25.md)
- [Help fixing connection issues](https://help.murlist.com/email-warmup/common-errors/connection-errors/help-connection-issues.md)