The following steps may require an administrator account. After digging through some configuration files, I found out how to restore the default font without resetting the Mail app in its entirety. After changing the font around a bit, I realized that it’s not possible to restore the default font, San Francisco (referred to as “System Font”). Thank you.How to reset Font & Colors Settings in Apple MailĪ few weeks ago, I changed the default font settings in Apple Mail (Mail > Preferences > Fonts & Colors) to experiment with a different look. If you know of any other solutions for the SMTP server offline Mac mail issue, kindly let me know through the comments section below.

After that reopen the Mail app and check if the problem is still occurring.

From the Force Quit list select the Mail app.

Quickly press and release Option + Command + Esc key together.

Correct the username by appending domain name 9Ex: or your own domain).

Choose “ Edit SMTP Server List” from the outgoing mail server drop-down menu.

From the left side list, select the account which causes the issue.Go to Network Preferences -> Advanced section of Ethernet and WiFi interfaces. Open the Mail app and check your issue.Re-enter the password that you just deleted.Choose your account SMTP server from the Edit SMTP servers list.Open Mail app and go to Preferences -> Accounts tab.Delete all relevant password entries for SMTP servers.Copy and store the password in your hard drive in the different locations (for safety).

Search and find the entry which starts with SMTP ://.

Enter the name of your SMTP server in keychain search boxes like or.

Go to Applications > Utilities > Keychain Access and delete all SMTP passwords from the keychain.

Click the SMTP server and choose Edit SMTP Server List from the list.

In the Accounts tab, choose the account which is Outgoing Mail Server (SMTP) labeled as Offline.

Reset apple mail preferences