Learn English – Should we always use the exclamation mark in expressions like “thank you”, “the pleasure”, etc

I think if you ask the experts who would claim that they know what the “correct” way to punctuate something is, they would tell you that a sentence may only have one terminal punctuation mark—that is to say, neither “?!” nor “!?” is correct.

So, no matter what order you use, you’ll never please those people. The Corpus of Contemporary American English has 3742 examples of “?!” and 1197 examples of “!?”. Clearly both orderings enjoy substantial usage, although it does appear that “?!” enjoys a majority of usage, probably because most sentences that get the double punctuation treatment are syntactically questions that have an exclamation point added for emphasis.

Edit: I checked in the British National Corpus, and it has 224 instances of “?!” and 121 instances of “!?”.

In English, it is always an error. There should be no space between a sentence and its ending punctuation, whether that's a period, a question mark, or an exclamation mark. There should also be no space before a colon, semicolon, or comma. The only ending punctuation mark that sometimes needs to be preceded by a space is a dash.

I see this error most often with people who never really learned to type. In handwriting, spacing is more, um, negotiable and subject to interpretation.