Mjml: Mising `alt` attribute in social button `<img>` tags increases spam score.

[yrammos]

According to mail-tester.com, among other similar tools, HTML email with images that lack an alt value is penalized with a higher spam likelihood.

Unfortunately the <mj-social-element> does not accept an alt attribute. Could this be amended?

Thanks.

[iRyusa]

Hi,

In fact this is supported but not listed as a valid attribute maybe @kmcb777 can fix it for the next release ?

[kmcb777]

the fix has been merged and included in the 4.2-beta so i'll close this one