Ttdfjt

For example:

If you don’t see this email in your inbox within If you don’t see this email in your inbox withinIf you don’t see this email in your inbox within
 - If you don’t see this email in your inbox within.If you don’t see this email 
 in your inbox within
 - If you don’t see this email in your inbox within.If you don’t see this email 
 in your inbox within

I had tried:

begintabbing
> > If you don’t see this email in youIf you don’t see this email in youIf you don’t see this email in you\
endtabbing

But it goes for a long time without going to second line.

I would not use the tabbing environment here. Instead, I would use an itemize environment.

documentclassarticle
usepackageenumitem % macros to modify appearance of 'itemize' environments

begindocument
If you don't see this email in your inbox within If you don't see this email in your inbox within. If you don't see this email in your inbox within
beginitemize[nosep,label=textendash] % 'nosep' makes for compact "look" of the list
item If you don't see this email in your inbox within. If you don't see this email in your inbox within
item If you don't see this email in your inbox within. If you don't see this email in your inbox within
enditemize
enddocument

You may ask, why use an itemize environment instead of a tabbing environment? It's because itemize environments are far more flexible and customizable. Using the more abstract itemize environment is also more in keeping with one of the core philosophies of LaTeX, which is to separate the content of the document from the formatting side of things. A tabbing environment comes close to applying visual formatting, which is (generally) frowned upon in LaTeX circles...

The answer is, of course use, itemize. But since this has been already explained, and the question show that you are a new user, and probably the use of that environment (specially in nested list) will be a little overwhelming for new users, worth to mention that there are options to make itemized lists in a simplified way. One is use the markdown package:

documentclassarticle
usepackagemarkdown
deflabeliteminormalfontbfseries-- % custom bullet 
begindocument
beginmarkdown

- If you don’t see this email in your inbox within. If you don’t see this email in your inbox within 

- If you don’t see this email in your inbox within. If you don’t see this email in your inbox within 

endmarkdown
enddocument

Note that within the markdown environment you are not writting LaTeX, but a different language that will be translated to LaTeX, so if you write *italic* will be internally translated to emphitalic and the output will be "italic", but writing directly emphitalic the output is simply "emphitalic". The bad news is that the markdow syntax is limited to a very basic format. The good new is that very easy, and when is not enough, you can end the environment and return to LaTeX syntax.

Alternatively, instead of markdown inside a LaTeX document, you can also write LaTeX inside a Rmarkdown document using Rstudio, without this limitation, so you can make a test.Rmd file with simply:

---
documentclass: article
classoption: twocolumn, a4paper
output:
 pdf_document: default
---

deflabeliteminormalfontbfseries-- <!-- custom bullet -->

- This document allows *italics*. 

- This document allows emphitalics and and any other
 fboxLaTeX command.

This will translated to a test.tex document and then compiled to produce a test.pdf: