Twitter doesn’t allow multiple accounts on one email address… or do they? If you have Gmail, you can create additional twitter accounts by using aliases. To create an alias in Gmail, you simply add a plus sign (+) after your Gmail user name and add the alias before the @ symbol. For instance, if you receive email at: email@example.com, you would create an alias by using: firstname.lastname@example.org.
An added bonus to using an alias in Gmail is that you can filter messages that are sent to that alias. Let’s say I create a twitter account using an email address, email@example.com. I can then set up a filter in Gmail (Gear Icon > Mail Settings > Filters > Create New Filter) and perform a variety of actions on emails sent to my alias such as archiving (skip inbox) and applying a label. This way I can review the messages under this label that may not be as time sensitive as my main inbox.
Using email aliases in Gmail is also a great strategy for signing up for websites that you may not want to see emails from on a regular basis. You can create a Gmail alias like ‘firstname.lastname@example.org’ and create a filter that applies a label and skips the inbox for all messages sent to your alias. The only trick here is that some sites don’t allow the plus sign (+) in email addresses due to outdated/over-aggressive validation logic.