It is also a good practice as long as one does so without excessive fanfare and pomp.  As Imam Nawawi states in Kitab al-Adhkar welcoming the pilgrims with a prayer like “May Allah accept your hajj, forgive your sins, and replenish your provision” is fine.  We read in a report that the Prophet (peace be upon him) prayed as follows: “O Allah! Forgive those who perform Hajj as well as those they pray for.”

Furthermore, wishing well and congratulating each other for blessings and favors is a good custom; it is bound to enhance and strengthen the bonds of Islamic brotherhood.